I have made a mistake on my tax return and had to amend it, which caused my parents to be unable to e-file their tax return this year (they filed in via TurboTax at first, but it got rejected because of the mistake).
I wanted to know which forms/files I have to include when mailing tax forms. Also, since this is because of me amending my tax return, should I attach my amended tax form along with my parents' tax forms? This is for the federal and state tax refunds.
We have already filed for an extension, by the way!
