How to File an Amended Maryland Tax Return

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What Is the Maryland Definition of a Tax Amendment?

If you need to make changes in your original tax return for a specific year, then you must file a tax amendment form. 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. Also, if you filed an amended federal tax return, you must also amend your Maryland state tax return.

How to file a Tax Amendment in Maryland

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You can also download, fill out, and mail your tax amendment.

Maryland State Tax Amendment Forms (download, print out, fill out, and mail)

Residents amending a 2012 Maryland tax return 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.

If you wish to amend a Tax Year prior to 2009, you must complete Form 502X for the year to be amended. 

For Yax Year 2008, complete a revised Form 505 and Form 505NR. Enter the result on line 21 or 22 of Form 502X and refer to instruction 10. 

Resident Forms

FormDescription
Form 502X (2014) 2014 form available soon
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)
Form 502X and 502XS (2010) Amended Maryland Tax Return: Resident (Long and Short)
Form 502X and 502XS (Prior to 2010) Amended Maryland Tax Return: Residents (Long and Short)

Nonresident Forms

Form/ScheduleDescription
Form 505X (2014) 2014 form available soon
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
Form 505X (2010) Maryland Nonresident Amended Tax Return
Form 505NR (2010) Maryland Nonresident Income Tax Calculation
Form 505X (2009) Maryland Nonresident Amended Maryland Tax Return
Form 505 (2008) Maryland Nonresident Income Tax Return
Form 505NR (2008) Maryland Nonresident Income Tax Calculation

Penalties, Interest, and Fees

The state of Maryland's Comptroller Office can issue several penalties, including a penalty for not filing a tax return, a penalty for failing to pay the tax on time, a fraudulent return penalty or a penalty for making false claims.

The Comptroller of Maryland can penalize the taxpayer for up to $500 if a fraudulent or substantially wrong information is present in a filed tax return. In addition, the taxpayer may face criminal charges for a fraudulent return.

The state of Maryland also imposes a charge for a check that doesn't clear amounting to $30.

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 to mail your tax amendment -  Maryland Mailing Address:

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

 

Learn how to file a federal tax amendment.

More information on MD state taxes.

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