After you file

You want to do it on paper yourself?   

 

From the MA tax site:

 

How to Amend a Return

You can amend a Massachusetts tax return by using:

  • MassTaxConnect
    (Some restrictions apply when you amend a personal income tax return.)
  • The software that your original return was filed with
    (Some software vendors do not allow you to amend a return. Also, software vendors can only amend a current year return and 2 years prior.)
  • A revised paper return with the Amended return oval filled in.
    (Per TIR 16-9 and TIR 21-9, if you are required to file and pay electronically, you must also amend your return the same way.)  
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**