if you used online, they may have been permanently deleted because Turbotax only saves the last 6 or 7 years. 2023 would be year 7. the same as the IRS. you can access the IRS website to request a transcript. if you need the return you'll need to file form 4506 or 4506-tT for transcript only. don't know if 2017 is available because the IRS has substantially altered its web page for transcripts.
in the future, once your return is complete save a copy as a pdf. I save two copies. one on my computer and one on my thumb drive in case one drive goes bad.
