If you used the desktop download software to prepare your 2024 return, the return is only stored on the hard drive of the comport you used or any backup device you stored it on, like a flash drive. It is not stored online anywhere.
If you only have your paper copy, then make do with that if you need to amend. You can get the Form 1040X from the IRS:
https://www.irs.gov/pub/irs-pdf/f1040x.pdf
https://www.irs.gov/pub/irs-pdf/i1040x.pdf
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**