I prepared my tax last year with turbo tax but never filed them. can i file this year and last year at the same time on here?

[xmasbaby0]

No.  Only a 2024 return can be e-filed.  

E-filing is permanently closed for 2023 returns, so your un-filed 2023 return can only be filed by mail now.  You will need to print it, sign and date it in ink, and mail it to the IRS and your state.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as certified mail so you will know the IRS/state received the return.