After you file

That depends if it was a Traditional or Roth contribution and if it created a Savers Credit (8880 form).

 

If Traditional or 8880 form then,  yes - you need to amend.  If Roth and no 8880 form, then no.

**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**