To file an amended return, you must return to the program used to originally file by entering the same username and password.
However, you may not need to file an amended return. In many cases, the IRS is automatically adjusting calculations. In other cases, while the federal return will not be amended, the state may need to be amended.
To find out more, see:
Do I need to amend?
Do I need to amend my state if I amend my federal?
How do I amend my 2020 return?
Why can't I amend my return?
@mpierro2
