NOTE: When you open your return back up, do not make any changes in it if it's already been filed. If you later have to amend the return, it has to start off exactly as it was when it was originally filed.
- Log in and at the Tax Home or in the section "Your Tax Returns & Documents" for 2020, look for a link "Add a State."
- Click on "Add a State." (you don't really add one. That's just to open your return back up.)
