I am amending my filed 2017 Massachusetts income tax return. Do I need to send in Form M-8453 with my amended return? Do I include W2s and 1099s if they didn't change?

[KatrinaB]

No. You only send in forms that document the changes you made to your return. For example, if you added another form W-2 when you amended your return then you would send a copy of it.

[BILLNET]

605.1. Amending Tax Returns

...Please note: the amended return must include all forms and schedules included with the original return to be processed correctly. Do not include any additional documents, like a copy of the original return or an application for abatement.