How to File an Amended Maryland Tax Return

Maryland State Taxes
amend Maryland taxes
Maryland
"Old Line State"

When Do I Need to Prepare and File My Maryland Tax Amendment?

You should file it no later than 3 years after the date of the original tax return. If the IRS makes changes to your tax return, you should notify the state of Maryland within a period of 90 days after the IRS made changes and finalized the process.

How Do I Correct My Accepted Maryland Tax Return or File a Tax Amendment in Maryland?

If you need to make changes in your original state tax return, then you must file a tax amendment form. In addition, you filed an amended federal tax return, you must also amend your Maryland state tax return.

Here are your two options to prepare and file a Maryland tax amendment:

  1. Download and complete either Form 502X (residents) or Form 505X (nonresidents) yourself. When you're done, print out the return and mail it to: Comptroller of Maryland, Amended Return Unit, Annapolis, MD 21411-0001 OR
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Maryland State Tax Amendment Forms (Download, Fill Out, Print Out, and Mail)

Residents amending a 2012 and later Maryland tax returns should complete Form 502X. For Tax Years prior to 2012, fill out Form 502X/502XS for the appropriate Tax Year. You should only fill out form 502XS if you need to change your previously reported wages, change the amount of tax withheld, change the number of exemptions, make a change to your deductions, switching from itemized to standard deduction, or changing the amount of deduction, either standard or itemized.

Nonresidents should fill out Form 505X for the Tax Year they are amending. In addition, you must attach revised versions Forms 505 and 505NR to your amended return. If you are changing from nonresident to resident status, you must use Form 502X and see Instruction 13.

Resident Forms

FormDescription
Form 502X (2014) Amended Maryland Tax Return: Resident
Form 502X (2013) Amended Maryland Tax Return: Resident
Form 502X (2012) Amended Maryland Tax Return: Resident
Form 502X and 502XS (2011) Amended Maryland Tax Return: Resident (Long and Short)

Nonresident Forms

Form/ScheduleDescription
Form 505X (2014) Maryland Nonresident Amended Tax Return
Form 505X (2013) Maryland Nonresident Amended Tax Return
Form 505NR (2013) Maryland Nonresident Income Tax Calculation
Form 505X (2012) Maryland Nonresident Amended Tax Return
Form 505NR (2012) Maryland Nonresident Income Tax Calculation
Form 505X (2011) Maryland Nonresident Amended Tax Return
Form 505NR (2011) Maryland Nonresident Income Tax Calculation

How Do I Check the Status of My Amended Maryland Tax Return?

You can call the Comptroller of Maryland at 410-260-7980 (from Central Maryland) or 1-800-638-2937 (from elsewhere in Maryland).

What Are the Penalties, Interest, and Fees Related to Maryland Tax Amendments?

The Comptroller of Maryland charges a 25% penality for failing to file a tax return. It also collect a 25% penalty of the underpayment tax due. 

There is also interest collected on unpaid taxes. It currently stands at 13% per year accrued from the due date of the tax return, and can be up to 25% of the amount of tax owed.

Where Do I Mail My Maryland Tax Amendment? - Maryland Mailing Address:

Comptroller of Maryland
Amended Return Unit
Annapolis, MD 21411-0001

Comptroller of Maryland Phone Number: 410-260-7980 (from Central Maryland) or 1-800-638-2937 (from elsewhere in Maryland)

Comptroller of Maryland

Where Do I Find More Information on Maryland State Income Taxes?

How Do I File Only My Maryland Tax Return?

Where is my Maryland State Tax Refund?

Maryland Tax Extension

Maryland State Taxes

What If I Need to Prepare and File My Maryland Amended Tax Return?

Learn how to file a federal tax amendment.

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