@KNERD I do know that TurboTax is often able to use a PDF to amend a return prepared in a competitor's software. You may want to inquire about the reverse using another software. If you're able to transfer your original e-filing using a PDF, you may also be able to amend using the competitor's software.
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
