2023 Business Income Tax Forms and Instructions


Audience: Business

Instruction Booklets

NumberTitleDescription
CorporationMaryland Income Tax Form Instructions for CorporationsInstructions for filing corporation income tax returns for the calendar year or any other tax year or period beginning in 2023.
Pass-Through EntityMaryland Income Tax Form Instructions for Pass-Through EntitiesInstructions for filing pass-through entity income tax returns for the calendar year or any other tax year or period beginning in 2023.
Electing Pass-Through EntityMaryland Income Tax Form Instructions for Electing Pass-Through EntitiesInstructions for filing Electing pass-through entity income tax returns for the calendar year or any other tax year or period beginning in 2023.

Corporation Income Tax Forms

NumberTitleDescription
500Maryland Corporation Income Tax ReturnForm used by a corporation and certain other organizations to file an income tax return for a specific tax year or period.
500 (2D)Maryland Corporation Income Tax Return. Read PDF Viewer And/Or Browser Incompatibility if you cannot open this form.Form used by a corporation and certain other organizations to file an income tax return for a specific tax year or period.
500DDeclaration of Estimated Corporation Income TaxForm used by a corporation to declare and remit estimated income tax for tax year 2023.
500D (2D)Declaration of Estimated Corporation Income Tax. Read PDF Viewer And/Or Browser Incompatibility if you cannot open this form.Form used by a corporation to declare and remit estimated income tax for tax year 2023.
500CRWBusiness Income Tax CreditsForm used to claim selected business tax credits against corporation or personal income tax. An electronic return must be submitted to claim a business tax credit on Form 500CR. Maryland Form 500CRW Waiver Request for Electronically Filing Form 500CR must be submitted in order to file a paper version of Maryland Form 500CR.
500DMDecoupling ModificationForm used to determine the amount of addition and subtraction modifications that are required as a result of Maryland's decoupling from certain federal provisions listed on the form.
500EApplication for an Extension to File Corporation Income Tax ReturnForm used to apply for an extension of time to file the corporation income tax return, and to remit any tax that may be due.
500E (2D)Application for an Extension to File Corporation Income Tax Return. Read PDF Viewer And/Or Browser Incompatibility if you cannot open this form.Form used to apply for an extension of time to file the corporation income tax return, and to remit any tax that may be due.
500UPUnderpayment of Estimated Income Tax by Corporations and Pass-Through EntitiesForm and instructions used by corporations or pass-through entities to calculate the amount of interest and penalty for failure to pay the required amount of estimated income tax when due.
500UP (2D)Underpayment of Estimated Income Tax by Corporations and Pass-Through Entities. Read PDF Viewer And/Or Browser Incompatibility if you cannot open this form.Form and instructions used by corporations or pass-through entities to calculate the amount of interest and penalty for failure to pay the required amount of estimated income tax when due.

Corporation Electronic Filing Forms

NumberTitleDescription
EL101BMaryland Income Tax Declaration for Corporate Electronic FilingForm for corporate, fiduciary, and pass-through entity filers to use to establish a signature document.
EL102BMaryland Income Tax payment voucher for business & fiduciary electronic filersForm for corporate, fiduciary, and pass-through entity filers to use to submit payment of any balance due on an electronically filed return, if the filers do not pay by credit card or direct debit.

Pass-Through Entity Income Tax Forms

NumberTitleDescription
510Pass-Through Entity Tax ReturnForm used for filing pass-through entity income tax return for the calendar year or any other tax year or period beginning in 2023.
511Maryland Pass-Through Entity Election Income Tax ReturnForm used for filing pass-through entity electing income tax return for the calendar year or any other tax year or period beginning in 2023.
510CMaryland Composite Pass-Through Entity Income Tax ReturnPass-Through entities may use Form 510C to file a composite income tax return on behalf of eligible nonresident individual members. Nonresident members other than individuals may not participate in the composite return.
510/511DDeclaration of Estimated Pass-Through Entity TaxForm used by a pass-through entity to declare and remit estimated tax for tax year 2023.
510/511EApplication for Extension to File Pass-Through EntityForm used to apply for an extension of time to file the pass-through entity income tax return, and to remit any tax that may be due.
510/511 Schedule K-1Maryland Pass-Through Entity Members InformationUse Form 510/511 (Schedule K-1) to report the distributive or pro rata share of the member's income, additions, subtractions, nonresident tax and credits apportioned to Maryland.

Miscellaneous Forms

NumberTitleDescription
548PReporting Agent AuthorizationForm for taxpayer to appoint Reporting Agent with the authority to sign and file employer withholding and/or sales and use tax returns and make deposits electronically or on paper. Form also authorizes the Comptroller to disclose confidential information to Reporting Agent.