You can complete and e-file your 2024 return online until October 15, 2025 if you filed an extension. Of course you can’t do your 2025 return until next year. The other previous returns must be prepared with a disk or downloaded program to your computer for that particular year. The return must be printed and mailed. You might find locating prior programs difficult. You could try downloading the appropriate forms and completing them manually or go to a paid preparer.
