After you file

since you can no longer e-file 2024, you can attach a handwritten statement to your mailed-in return. currently Turbotax has no provision to attach a form or statement that it does not support to an e-filed return. certain items, as listed, can be mailed with form 8453 if you e-file

https://www.irs.gov/pub/irs-pdf/f8453.pdf .