﻿<?xml version="1.0" encoding="utf-8"?>
<Return returnVersion="2022v5.0" xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-01-17T15:23:51-07:00</ReturnTs>
    <TaxPeriodEndDt>2023-08-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2022-09-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>465690446</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Thompson School Parent Teacher Organization</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>THOM</BusinessNameControlTxt>
      <PhoneNum>7813163768</PhoneNum>
      <USAddress>
        <AddressLine1Txt>187 Everett Street</AddressLine1Txt>
        <CityNm>Arlington</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02474</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Daniel Nezich</PersonNm>
      <PersonTitleTxt>Co-Treasurer</PersonTitleTxt>
      <PhoneNum>6172766944</PhoneNum>
      <SignatureDt>2024-01-17</SignatureDt>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>0</IRSResponsiblePrtyInfoCurrInd>
    <Form8822BAttachedInd>X</Form8822BAttachedInd>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>1</TrustedCustomerCd>
        <OOBSecurityVerificationCd>11</OOBSecurityVerificationCd>
        <LastSubmissionRqrOOBCd>0</LastSubmissionRqrOOBCd>
        <AuthenticationAssuranceLevelCd>AAL2</AuthenticationAssuranceLevelCd>
        <ProfilePasswordChangeInd>X</ProfilePasswordChangeInd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2022</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990EZ documentId="R000001" referenceDocumentId="R000004 R000005 R000007" softwareId="22015720" softwareVersionNum="v1.00">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>www.thompsonschoolpto.org</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="R000002">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>77037</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>49072</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>0</MembershipDuesAmt>
      <InvestmentIncomeAmt>0</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>0</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <GamingGrossIncomeAmt referenceDocumentId="R000003">0</GamingGrossIncomeAmt>
      <FundraisingGrossIncomeAmt fndrsngEventContriPrevRptAmt="32250" referenceDocumentId="R000003">14375</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>213</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>14162</SpecialEventsNetIncomeLossAmt>
      <GrossSalesOfInventoryAmt>1820</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>1844</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>-24</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>11770</OtherRevenueTotalAmt>
      <TotalRevenueAmt>74980</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>5596</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>0</BenefitsPaidToOrForMembersAmt>
      <SalariesOtherCompEmplBnftAmt>0</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>2807</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>0</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>951</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>91551</OtherExpensesTotalAmt>
      <TotalExpensesAmt>100905</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-25925</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>136149</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>1</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>110225</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>136305</BOYAmt>
        <EOYAmt>111923</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <LandAndBuildingsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>200</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>136505</BOYAmt>
        <EOYAmt>111923</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>356</BOYAmt>
        <EOYAmt>1698</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>136149</BOYAmt>
        <EOYAmt>110225</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>Support of education and enrichment of Thompson School students</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Grade-level enrichment activities, including field trips, benefiting 500-plus students</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>28446</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Academic/classroom support for staff members and students, benefiting 70+ staff members and 500+ students</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>5090</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>17625</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>All-school enrichment activities including author and artist visits, benefiting 500+ students and their families</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>16643</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Community building-events, 5th grade graduation celebration, hospitality, staff and volunteer appreciation, student enrichment activities/clubs</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>2506</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>35286</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>98000</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Melissa Crowley</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Lani Obermayer</PersonNm>
        <TitleTxt>Co-Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Daniel Nezich</PersonNm>
        <TitleTxt>Co-Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <Form1120PolFiledInd>0</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>MA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>Daniel Nezich</PersonNm>
        <USAddress>
          <AddressLine1Txt>187 Everett Street</AddressLine1Txt>
          <CityNm>Arlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>024743698</ZIPCd>
        </USAddress>
        <PhoneNum>7813163768</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>0</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="R000002" softwareId="22015720" softwareVersionNum="v1.00">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>58452</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>55027</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>24428</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>44405</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>49072</CurrentTaxYearAmt>
        <TotalAmt>231384</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>43814</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>33722</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>13643</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>14585</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>27965</CurrentTaxYearAmt>
        <TotalAmt>133729</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>102266</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>88749</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>38071</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>58990</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>77037</CurrentTaxYearAmt>
        <TotalAmt>365113</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>365113</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>99</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>0</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>0</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>0</CurrentTaxYearAmt>
        <TotalAmt>99</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>99</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>0</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>0</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>0</CurrentTaxYearAmt>
        <TotalAmt>99</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>102365</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>88749</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>38071</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>58990</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>77037</CurrentTaxYearAmt>
        <TotalAmt>365212</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.99973</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99949</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00027</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00051</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleG documentId="R000003" softwareId="22015720" softwareVersionNum="v1.00">
      <FundraisingEventInformationGrp>
        <Event1Nm>Direct Donation Drive</Event1Nm>
        <GrossReceiptsEvent1Amt>32250</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>0</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>32250</GrossRevenueEvent1Amt>
        <CashPrizesEvent1Amt>0</CashPrizesEvent1Amt>
        <NonCashPrizesEvent1Amt>0</NonCashPrizesEvent1Amt>
        <RentFacilityCostsEvent1Amt>0</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>0</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>0</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>0</OtherDirectExpensesEvent1Amt>
        <FoodAndBeverageOtherEventsAmt>0</FoodAndBeverageOtherEventsAmt>
        <EntertainmentOtherEventsAmt>0</EntertainmentOtherEventsAmt>
        <GrossReceiptsTotalAmt>32250</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>0</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>32250</GrossRevenueTotalEventsAmt>
        <CashPrizesTotalEventsAmt>0</CashPrizesTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>0</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>0</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>0</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>0</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>0</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>0</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>32250</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="R000004" softwareId="22015720" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>Revenue from family events, student enrichment activities, and miscellaneous loyalty payment programs</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Grant applications approved for projects from school clubs and academic/classroom teachers</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Expenses related to community-building events, 5th grade graduation celebration, hospitality, staff and volunteer appreciation, classroom and school supplies, and PTO administrative expenses such as transaction fees and insurance and state filing fees and taxes</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>Accumulated rounding error offset of $1 so that Line 21 matches the rounded actual value</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>A) Bank error refund due of $200 (the asset was created last year to offest the bank error expense; this year the refund is considered a transfer of this asset to our bank account so as to accurately report revenue, expenses, and assets)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>A) Uncashed checks and $1 adjustment to account for accrued rounding error and bring the year-end total assets in line with the true asset value. B) Uncashed checks</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <ReasonableCauseExplanation documentId="R000005" softwareId="22015720" softwareVersionNum="v1.00">
      <ExplanationTxt>Delay of one day was introduced due to online filing account registration error that required manual correction.</ExplanationTxt>
    </ReasonableCauseExplanation>
  </ReturnData>
</Return>