I recently submitted (and already accepted by IRS) a 2021,1120S form. Per previous posted instructions, I went back and renamed file to allow an amended return. When I reached the last "stage" to file the form, I receive an error that says I have already filed my (original) 1120S. It's my understanding that TurboTax now allows e-filing of superseded business forms (i.e 1120S). Why is this not working. IRS states if you filed electronically, the superseded/amended return also has to be filed electronically.
