Form 504 at a glance
What it is: Maryland Form 504 is the Fiduciary Income Tax Return.
Who signs: The Fiduciary or Officer representing Fiduciary signs and dates. A preparer other than the fiduciary also signs and dates, and the preparer signature is Required by Law.
Where and when to file: Mail to: Comptroller of Maryland Revenue Administration Division, 110 Carroll Street Annapolis, MD 21411-0001.
What to bring and attach to Form 504
Nonresidents must include Form 504NR.
Make check or money order payable to Comptroller of Maryland.
On your check or money order, in blue or black ink only, you must include the Federal Employer Identification Number, tax year, and tax type. Failure to include this information will delay the processing of your payment.
A filled-in Form 504 example: a simple trust files for 2025
How to fill out Form 504, box by box
Type of entity
Check the box(es) on the return corresponding to your federal return.
The types are 1. Decedent's estate, 2. Simple trust, 3. Complex trust, 4. Grantor type trust, 5. Bankruptcy estate, 6. Qualified funeral trust, 7. Electing Small Business Trust and 8. Other.
Name and mailing address of the fiduciary
Enter the Federal Employer Identification Number (9 digits), the Name of Estate or Trust and the Name and Title of Fiduciary.
Enter the Current Mailing Address of Fiduciary: Line 1 (Street No. and Street Name or PO Box), Line 2 (Apt No., Suite No., Floor No.), City or Town, State and ZIP Code +4.
Enter the Country Name, Foreign Province/State/County and Foreign postal code.
Decedent's estate information
If Decedent's estate: enter the Date of death, the Decedent's Social Security Number (do not enter / or -) and the Domicile of decedent, and check here if final return.
Resident status
Under RESIDENT STATUS, check box if resident and complete Subdivision Code, County and City, town or taxing area. Check box if nonresident. See Form 504NR.
Amended return
Under AMENDED RETURN, check applicable box(es): This is an amended return (Attach documentation). Net operating loss is being carried back. Name or address has changed.
Federal taxable income of fiduciary, exemption and Electing Small Business Trust income
Line 1: Federal taxable income of fiduciary (from Line 23 of federal Form 1041). See Instruction 9.
Line 1a: Capital gain or (loss).
Line 2: Exemption claimed on federal return.
Line 3: Income from Electing Small Business Trust (ESBT). Do Not Prorate. See Instruction 10.
Line 4: Federal taxable income plus nonallocable additions (Enter the sum of Line 1, 2, and 3.).
Maryland adjusted gross income, Maryland exemption and Fiduciary's Maryland taxable net income
Line 5: Fiduciary's Share of Maryland Modifications (Enter the positive or negative number from Form 504 Schedule A Line 8, 9d, or 10f.).
Line 6: Line 4 plus or minus Line 5.
Line 7: Nonresident beneficiary deduction from Form 504 Schedule A, Line 13.
Line 8: Maryland adjusted gross income (Subtract Line 7 from Line 6.).
Line 9: Maryland exemption. See Instruction 10.
Line 10: Fiduciary's Maryland taxable net income (Subtract Line 9 from Line 8.). NOTE: Nonresident fiduciary - see instruction for Form 504NR.
Line 10a: Net capital gain income subject to additional tax from Line 9 of Form 504CG (Attach Form 504CG).
Maryland tax, special nonresident tax and additional tax on net capital gain income
Line 11: Maryland tax (Use rate schedule in instructions or enter amount from Form 504NR, Line 21.).
Line 12: Special nonresident tax. Nonresidents: Enter the amount from Form 504NR, Line 22. Residents: Enter zero. (See Instruction 14.)
Line 13: Additional tax on net capital gain income. Multiply Line 10a by .02.
Line 14: Total Maryland tax (Add Lines 11 through 13.).
Credit and total credits
Line 15: Credit for fiduciary income tax paid to another state and/or credit for preservation and conservation easements from Part AA, Line 1 and Part AA, Line 6 of Form 502CR (Attach Form 502CR.).
Line 16: Enter the Nonrefundable Business Tax Credits from Part AAA of Form 504CR.
Line 17: Total credits (Add Lines 15 and 16).
Line 18: Maryland Tax after credits (Subtract Line 17 from Line 14, if less than zero, enter zero).
Local tax
Line 19: Local tax. See Instruction 15. Non-residents: enter zero.
Line 20: Local Credit for fiduciary income tax paid to another state from Part BB of Form 502CR.
Line 21: Local tax after credit. (Subtract Line 20 from Line 19.) If less than zero, enter zero.
Line 22: Total Maryland and local tax. (Add Lines 18 and 21.)
Contributions
Line 23: Contribution to Chesapeake Bay and Endangered Species Fund.
Line 24: Contribution to Developmental Disabilities Services and Support Fund.
Line 25: Contribution to Maryland Cancer Fund.
Line 26: Contribution to Fair Campaign Financing Fund.
Line 27: Contribution to Maryland Veterans Trust Fund.
Line 28: Total Maryland income tax, local income tax and contributions (Add Lines 22 through 27.).
Maryland and local tax withheld, estimated tax payments and payments and credits
Line 29: Maryland and local tax withheld. See Instruction 17.
Line 30: 2025 estimated tax payments, amount applied from 2024 return, and payment made with an extension request.
Line 31: Amount withheld on Form MW506NRS.
Line 32: Nonresident tax paid by pass-through entities (Attach Maryland Schedule K-1 (510/511).).
Line 33: Refundable Business and/or Maryland Historic Revitalization tax credits (Attach Form 504CR and/or Form 502S.).
Line 34: Total payments and credits (Add Lines 29 through 33.).
Balance due, overpayment and total amount due
Line 35: Balance due (If Line 28 is more than Line 34, enter the difference.).
Line 36: Overpayment (If Line 28 is less than Line 34, enter the difference.).
Line 37: Amount of overpayment to be applied to next year's estimated tax.
Line 38: Amount of overpayment to be refunded (Subtract Line 37 from Line 36.).
Line 39: Interest charges from Form 504UP or for late filing.
Line 40: TOTAL AMOUNT DUE (Add Lines 35 and 39.).
Amended returns
If you are filing an amended fiduciary income tax return, check the applicable boxes and draw a line through any barcodes on the front.
Explain the changes you are making. Attach a copy of the amended federal Form 1041 if the federal return is being amended, and any other required documentation.
Direct deposit of refund
Direct deposit of refund (see Instruction 18): Verify that all account information is correct and clearly legible.
Check here if you authorize the State of Maryland to issue your refund by direct deposit. Check here if this refund will go to an account outside of the United States.
41. For the direct deposit option, clearly and legibly complete 41a. Type of account: Checking Savings, 41b. Routing Number (9-digits), 41c. Account Number and 41d. Name(s) as it appears on the bank account.
Signature and verification
Check here if you authorize your preparer to discuss this return with Comptroller of Maryland.
Sign this return. By signing you declare, under penalties of perjury, that you have examined this return, including accompanying schedules and statements and to the best of your knowledge and belief it is true, correct and complete.
If prepared by a person other than taxpayer, the declaration is based on all information of which the preparer has any knowledge.
Enter the Printed name of the Preparer / or Firm's name, the Street address of Preparer or Firm's address, City, State, ZIP Code + 4, Telephone number of preparer and Preparer's PTIN (Required by Law).
Enter the Daytime telephone number (Fiduciary).
More rules for Form 504
Print Using Blue or Black Ink Only.
Common questions about Form 504
Who signs it?
The Fiduciary or Officer representing Fiduciary signs and dates.
Where do I file it?
Mail to: Comptroller of Maryland Revenue Administration Division, 110 Carroll Street Annapolis, MD 21411-0001.
Sources
[1] Form 504 (COM/RAD-021 09/25), Comptroller of Maryland (the Official source link on this page).