﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2024v5.2" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-02-26T11:27:18-08:00</ReturnTs>
    <TaxPeriodEndDt>2025-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>363683706</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>William R Healy CPA PC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>9501 West 144th Place Ste 202</AddressLine1Txt>
        <CityNm>Orland Park</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60462</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>205190621</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CARL SANDBURG MUSIC BOOSTERS INC</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>CO CARL SANDBURG HIGH SCHOOL</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>CARL</BusinessNameControlTxt>
      <PhoneNum>7086713100</PhoneNum>
      <USAddress>
        <AddressLine1Txt>13300 S LAGRANGE ROAD</AddressLine1Txt>
        <CityNm>ORLAND PARK</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60462</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JEAN ALVAREZ</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <SignatureDt>2026-02-26</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>WILLIAM R HEALY</PreparerPersonNm>
      <PTIN>P00027600</PTIN>
      <PhoneNum>7083491700</PhoneNum>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO" softwareId="24020490" softwareVersionNum="2024v5.2">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>cshsmusicboosters.weebly.com</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>80711</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>2995</ContributionsGiftsGrantsEtcAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="IRS990ScheduleG">77716</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>18584</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>59132</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <TotalRevenueAmt>62127</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>13730</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>1839</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>392</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>45745</OtherExpensesTotalAmt>
      <TotalExpensesAmt>61706</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>421</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>113308</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>113729</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>114128</BOYAmt>
        <EOYAmt>113729</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>114128</BOYAmt>
        <EOYAmt>113729</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>820</BOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>113308</BOYAmt>
        <EOYAmt>113729</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>TO PROVIDE SCHOLARSHIPS, AWARDS AND FELLOWSHIP OPPORTUNITIES FOR MUSIC STUDENTS, AND TO PROVIDE FINANCIAL SUPPORT FOR ALL MUSIC PROGRAMS AT CARL SANDBURG HIGH SCHOOL WHEN THE SCHOOL'S MUSIC BUDGET IS UNABLE TO PROVIDE REQUESTED FUNDING.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>TO PROVIDE FUNDING FOR SCHOLARSHIPS AND FELLOWSHIP OPPORTUNITIES FOR MUSIC STUDENTS AND TO SUPPLEMENT COSTS OF MUSIC PROGRAMS AT CARL SANDBURG HIGH SCHOOL IN ORLAND PARK, ILLINOIS</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>35371</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>35371</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JEAN ALVAREZ</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>20.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ALICIJA LATAWIEC</PersonNm>
        <TitleTxt>Sargent at Arms</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>6.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>REBECCA RIETZ</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>6.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>GRACE HONG DUFFIN</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>16.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>MICHELLE BELAIR</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>8.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ELLEN HADDID</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>6.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>IL</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>JEAN ALVAREZ</PersonNm>
        <USAddress>
          <AddressLine1Txt>13300 S LAGRANGE ROAD</AddressLine1Txt>
          <CityNm>ORLAND PARK</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60462</ZIPCd>
        </USAddress>
        <PhoneNum>7086713100</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" softwareId="24020490" softwareVersionNum="2024v5.2">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>24823</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>121391</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>90789</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>76796</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>80711</CurrentTaxYearAmt>
        <TotalAmt>394510</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>24823</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>121391</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>90789</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>76796</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>80711</CurrentTaxYearAmt>
        <TotalAmt>394510</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <PublicSupportTotal509Amt>394510</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>35</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>24</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1</CurrentTaxYearMinus2YearsAmt>
        <TotalAmt>60</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <TotalAmt>0</TotalAmt>
      </Post1975UBTIGrp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>35</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>24</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1</CurrentTaxYearMinus2YearsAmt>
        <TotalAmt>60</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>24858</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>121415</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>90790</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>76796</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>80711</CurrentTaxYearAmt>
        <TotalAmt>394570</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.99980</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99710</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00020</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00290</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleG documentId="IRS990ScheduleG" softwareId="24020490" softwareVersionNum="2024v5.2">
      <FundraisingEventInformationGrp>
        <Event1Nm>CRAFT SHOW</Event1Nm>
        <GrossReceiptsEvent1Amt>48804</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>48804</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>7772</OtherDirectExpensesEvent1Amt>
        <Event2Nm>JAZZ DINNER DANCE</Event2Nm>
        <GrossReceiptsEvent2Amt>14409</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>14409</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>7612</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>1</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>12479</GrossReceiptsOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>12479</GrossRevenueOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>3200</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>75692</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>75692</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>18584</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>18584</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>57108</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="24020490" softwareVersionNum="2024v5.2">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grants and Similar Amounts Paid In Excess of $5,000.1</FormAndLineReferenceDesc>
        <ExplanationTxt>| Cash Amount Given: $13730</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>MARCHING BAND PROGRAM COSTS $22158</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.2</FormAndLineReferenceDesc>
        <ExplanationTxt>MISCELLANEOUS $10220</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.3</FormAndLineReferenceDesc>
        <ExplanationTxt>STUDENT AWARDS &amp; BANQUET $2620</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.4</FormAndLineReferenceDesc>
        <ExplanationTxt>OUTSIDE JUDGES $2034</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.5</FormAndLineReferenceDesc>
        <ExplanationTxt>CURRICULAR BAND PROGRAM COSTS $1955</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.6</FormAndLineReferenceDesc>
        <ExplanationTxt>ORCHESTRA PROGRAM COSTS $1813</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.7</FormAndLineReferenceDesc>
        <ExplanationTxt>JAZZ BAND PROGRAM COSTS $1300</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.8</FormAndLineReferenceDesc>
        <ExplanationTxt>CHOIR PROGRAM COSTS $1282</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.9</FormAndLineReferenceDesc>
        <ExplanationTxt>8TH GRADE STEP UP EVENT $1203</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.10</FormAndLineReferenceDesc>
        <ExplanationTxt>SPRING MUSICAL SUPPORT $600</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.11</FormAndLineReferenceDesc>
        <ExplanationTxt>VEHICLE COSTS $406</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.13</FormAndLineReferenceDesc>
        <ExplanationTxt>BANK CHARGES $139</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.15</FormAndLineReferenceDesc>
        <ExplanationTxt>ILLINOIS FEE $15</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Total Liabilities.1</FormAndLineReferenceDesc>
        <ExplanationTxt>STUDENT TRIP DEPOSITS - Beginning $820 STUDENT TRIP DEPOSITS - Ending $0</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>