Washington, D.C., Income Tax Return Amendment

Instructions, Resources on how to prepare and e-File Washington, D.C. Tax Returns or how to prepare an Extension and/or previous Year Tax Returns

Prepare, eFile a DC + IRS Tax Return: Detailed eFile.com Service Overview

Prepare only a D.C. State Return without an IRS return. Details

Step by Step instructions on how to only Prepare and Download - not eFile - State Returns on eFile.com.

File a Washington, D.C. Tax Amendment

You cannot eFile a DC Tax Amendment anywhere, except mail it in. However, you can prepare it here on eFile.com.
Option 1: Sign into your eFile.com account, modify your Return and download/print your D-40 under My Account. Fill in the space next to the amended return text on the upper right-hand corner to indicate that it's an amended return. Sign the amended return and mail it to one of the addresses listed below.
Option 2: If you don't have an eFile.com account follow the step by step instruction on how to prepare a tax return/amendment.
Option 3: If you want to do the math on your own paper return then complete, sign DC Form D-40 - Print, Mail the Amended Return to D.C. Tax Department to one of the addresses below:
Tax Due Amendment Return
Office of Tax and Revenue
PO Box 96169
Washington, DC 20090-6169
Refund or No Payment Amendment Return
Office of Tax and Revenue
PO Box 9614
Washington, DC 20090-6145

D.C Tax Amendment Form D-40
This Form can be used to file an: Income Tax Return, Tax Amendment, Change of Address. Complete a Form D-40 and fill in the space next to the amended return text on the upper right-hand corner to indicate that it's an amended return.

Step 1: Select the Form D-40 by Tax Year below
Step 2: Fill in the space next to the amended return text on the upper right-hand corner to indicate that it's an amended return.
Step 3: Sign, Mail Your Amended Return to one of the addresses listed above

Current Tax Year only: Prepare online on eFile.com until the Oct. Deadline. When done Print, Sign and Mail in - not eFile - Your Tax Amendment, Address Change etc.

Important: After the October Deadline you can complete and sign tax forms online here on eFile, before you download, print and mail them to the state tax agency - Form D-40.

How to correct a rejected Tax Return

If your D.C. Tax Return was rejected by the D.C. Tax Agency - not eFile.com - instructions on how to correct a rejected D.C. Tax Return.

For all Tax Years prior to the current tax year. Prepare, Print, Sign and Mail-In - see addresses above - your Tax Amendment by Tax Year (Form D-40) as soon as possible. You will also file an IRS Tax Amendment Form 1040X.

Check Your D.C. Tax Amendment Status

1. Call the D.C. Department of Revenue at  (202) 727-4829.
2. Contact the D.C. Department of Revenue

Washington, D.C.  Refund Deadlines

A. Three years from the due date of the original tax year return, including valid filing extensions.
B. One year from the final determination of the amended federal return or federal change, whichever is later, provided that the allowable refund is not more than the decrease in Pennsylvania tax attributable to the federal change or correction.
C. Two years from the payment of an assessment, provided the amended return raises issues relating only to the prior assessment and the refund does not exceed the amount of tax paid on the prior assessment.
D. Two years from the filing of an amended D.C. return resulting in the payment of additional tax, provided that the current amended return raises issues relating solely to the prior amended return and that the refund does not exceed the amount of the tax payment made as a result of the prior amended return.
Additional Washington, D.C. Tax Income Taxes Deadlines

Washington, D.C. Income Tax Penalties

Find out how Pennsylvania Late Filing and Late Payment Penalties are calculated.
For IRS Tax and Late Filing Penalties we have an easy to use tool: The PENALTYucator.

File an IRS Tax Amendment by Tax Year

Instructions on how to prepare an IRS Tax Amendment on eFile.com, however the IRS does not accept Tax Amendments electronically.