There is no such thing as a signed copy of a transcript. Transcripts of tax returns come from the IRS. They contain all of the information from your tax return, but are not copies of your Form 1040. If you want a signed copy of your Form 1040, you print it, then sign it and date it yourself in ink. When you e-file a tax return, there is no physical signature. You "sign" electronically by entering your AGI. If someone like a lender or college wants a "signed" copy--you sign it in ink to make them happy.
You have to access your own account and/or print it for yourself using exactly the same account and user ID that you used when you prepared the return.
https://myturbotax.intuit.com/
Start a 2024 return online and enter some personal information so that the menu on the left opens up and lets you access your past year returns.
Many people have multiple TT accounts and forget how to access them. Log out of the account you are in now.
Or did you use the desktop version of TurboTax? If so, the files are on your own hard drive or any backup device you used like a flash drive.
You can get a free transcript from the IRS or for a fee of $30, an actual copy of your tax return.
https://www.irs.gov/individuals/get-transcript
https://www.irs.gov/pub/irs-pdf/f4506.pdf
SAVE YOUR TAX RETURNS !
EVERY year before mid-October you should save a copy of your tax return as a pdf and print a copy of it for your records. That way you will not be searching online frantically when you need it for a lender, FAFSA forms, your next tax return, etc.
In order to transfer a past year return to the new return you need the tax file
NOTE: TurboTax and the IRS save returns for seven years. Returns older than seven years are purged.
The form that you filed with the IRS is a tax return, not a transcript. A transcript is something you can get from the IRS that shows information from your tax return, but it is not a copy of your tax return.
If you e-filed you didn't sign the tax return when you sent it to the IRS, so there is no way to get a signed copy from TurboTax or from the IRS. If you need a signed copy of your tax return, do what xmasbaby0 said: print it and sign the printed copy.