<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-02-04</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001800347</issuerCik>
        <issuerName>E2open Parent Holdings, Inc.</issuerName>
        <issuerTradingSymbol>ETWO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001622745</rptOwnerCik>
            <rptOwnerName>Hantman Peter</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9600 GREAT HILLS TRAIL #300E</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AUSTIN</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78759</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Operating Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Common Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>472994</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series 1 Restricted Common Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>103206</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series 2 Restricted Common Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F4"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>61923</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These securities were issued pursuant to the Business Combination Agreement, dated October 14, 2020, by and among CC Neuberger Principal Holdings I, E2open Holdings, LLC, and the other parties thereto, as amended January 28, 2021, pursuant to which, among other things, the Reporting Person retained 472,994 Common Units in E2open Holdings.</footnote>
        <footnote id="F2">These Common Units represent non-voting limited liability company interests in E2open Holdings subject to the terms of the Third Amended and Restated Limited Liability Company Agreement of E2open Holdings (the &quot;LLC Agreement&quot;). Beginning on August 4, 2021, these Common Units (together with the same number of shares of Class V common stock of the Issuer, which provide no economic rights in the Issuer but entitle the holder thereof to one vote per share of Class V common stock) may be exchanged at the discretion of the holder once per calendar quarter (subject to certain limitations set forth in the LLC Agreement) for shares of Class A common stock of the Issuer on a one-for-one basis (or the cash value thereof, at the election of the Issuer).</footnote>
        <footnote id="F3">These Series 1 Restricted Common Units represent unvested, non-voting restricted limited liability company interests in E2open Holdings subject to the terms of the LLC Agreement. Each Series 1 Restricted Common Unit will vest on the first day on which the 5-day volume weighted average price of the Class A common stock is equal to at least $13.50, or upon certain change in control events specified in the LLC Agreement. Upon, vesting, each Series 1 Restricted Common Unit will convert automatically into one Common Unit.</footnote>
        <footnote id="F4">These Series 2 Restricted Common Units represent unvested, non-voting restricted limited liability company interests in E2open Holdings subject to the terms of the LLC Agreement. Each Series 2 Restricted Common Unit will vest on the first day on which the 20-day volume weighted average price of the Class A common stock is equal to at least $15.00, or upon certain change in control events specified in the LLC Agreement. Upon, vesting, each Series 2 Restricted Common Unit will convert automatically into one Common Unit.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jennifer S. Grafton, by Power of Attorney</signatureName>
        <signatureDate>2021-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
