﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2023v5.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-07-31T13:46:09-07:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>461843882</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>HD Financial Services LLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>123 Wolf Run Suite 4</AddressLine1Txt>
        <CityNm>Mukwonago</CityNm>
        <StateAbbreviationCd>WI</StateAbbreviationCd>
        <ZIPCd>53149</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>463678013</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>MUKWONAGO HIGH SCHOOL ATHLETIC BOOSTER CLUB INC</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>MUKW</BusinessNameControlTxt>
      <PhoneNum>2628942636</PhoneNum>
      <USAddress>
        <AddressLine1Txt>605 W SCHOOL RD</AddressLine1Txt>
        <CityNm>MUKWONAGO</CityNm>
        <StateAbbreviationCd>WI</StateAbbreviationCd>
        <ZIPCd>53149</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>PATSY EDELIS</PersonNm>
      <PersonTitleTxt>TREASURER</PersonTitleTxt>
      <PhoneNum>2628942636</PhoneNum>
      <SignatureDt>2024-07-25</SignatureDt>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>David Hansen</PreparerPersonNm>
      <PTIN>P01050639</PTIN>
      <PhoneNum>2629511457</PhoneNum>
      <PreparationDt>2024-07-31</PreparationDt>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-08-08 14:25:15Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="IRS990EZ-01" referenceDocumentId="IRS990ScheduleO-01">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>www.masd.k12.wi.us/mhs/hs-ath-booster.cfm</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA-01" referenceDocumentName="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>142229</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>6920</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>8916</MembershipDuesAmt>
      <InvestmentIncomeAmt>691</InvestmentIncomeAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="IRS990ScheduleG-01" referenceDocumentName="IRS990ScheduleG">125702</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>43992</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>81710</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>0</GrossProfitLossSlsOfInvntryAmt>
      <TotalRevenueAmt>98237</TotalRevenueAmt>
      <BenefitsPaidToOrForMembersAmt>2000</BenefitsPaidToOrForMembersAmt>
      <FeesAndOtherPymtToIndCntrctAmt>623</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>75614</OtherExpensesTotalAmt>
      <TotalExpensesAmt>78237</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>20000</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>138276</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>158276</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>138276</BOYAmt>
        <EOYAmt>158276</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>138276</BOYAmt>
        <EOYAmt>158276</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>138276</BOYAmt>
        <EOYAmt>158276</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>Mukwonago High School Althetic Booster Club, Inc., provides funds to athletic organizations and clubs that are underfunded to carry out their purpose of fostering local</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>CONTRIBUTIONS TO VARIOUS ATHLETIC PROGRAMS WITHIN MUKWONAGO TO FOSTER LOCAL AMATEUR ATHLETES</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>60307</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>60307</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN THORNTON</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TODD BECKNER</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JAMIE DEBOTH</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>PATSY EDELIS</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <InitiationFeesAndCapContriAmt>0</InitiationFeesAndCapContriAmt>
      <GrossReceiptsForPublicUseAmt>0</GrossReceiptsForPublicUseAmt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>PATSY EDELIS</PersonNm>
        <USAddress>
          <AddressLine1Txt>605 W SCHOOL RD</AddressLine1Txt>
          <CityNm>MUKWONAGO</CityNm>
          <StateAbbreviationCd>WI</StateAbbreviationCd>
          <ZIPCd>53149</ZIPCd>
        </USAddress>
        <PhoneNum>2623633467</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="IRS990ScheduleA-01" softwareId="23017509">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <OtherSupportSumAmt>0</OtherSupportSumAmt>
      <PublicSupportCY170Pct>0</PublicSupportCY170Pct>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>23338</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>21435</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>25768</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>14010</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>15836</CurrentTaxYearAmt>
        <TotalAmt>100387</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>127257</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>66088</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>114807</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>128194</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>125702</CurrentTaxYearAmt>
        <TotalAmt>562048</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>150595</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>87523</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>140575</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>142204</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>141538</CurrentTaxYearAmt>
        <TotalAmt>662435</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <TotalAmt>0</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>662435</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>120</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>48</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>141</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>691</CurrentTaxYearAmt>
        <TotalAmt>1019</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>120</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>48</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>141</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>691</CurrentTaxYearAmt>
        <TotalAmt>1019</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <TotalAmt>663454</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.99850</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99940</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00150</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00060</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleG documentId="IRS990ScheduleG-01">
      <FundraisingEventInformationGrp>
        <Event1Nm>HEART FEST</Event1Nm>
        <GrossReceiptsEvent1Amt>24017</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>24017</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>348</OtherDirectExpensesEvent1Amt>
        <Event2Nm>GOLF OUTING</Event2Nm>
        <GrossReceiptsEvent2Amt>66371</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>66371</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>27726</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>2</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>30383</GrossReceiptsOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>30383</GrossRevenueOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>15104</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>120771</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>120771</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>43178</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>43178</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>77593</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="23017509">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 GETS DISTRIBUTED TO TREASURER FOR REVIEW AND APPROVAL</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICE SUPPLIES 747.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUAL REPORT FEE 25.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>CONTRIBUTIONS TO VARIOUS MUKWONAGO ATHLETIC ORGANIZATIONS 60307.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>ADVERTISING 150.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHOLARSHIP 3000.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>LICENSES 51.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>INSURANCE 400.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>DONATIONS 9911.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>WEBSITE 1023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>