You don’t have to wait to file 2024 unless you know there will be carry overs from 2023.
Sorry it's too,late to start a 2023 or prior online return or use the mobile app, either on Turbo Tax or the IRS. And too late to efile 2023.
To do a prior year return you have to buy the Desktop program here,
https://turbotax.intuit.com/personal-taxes/past-years-products
You will need a full Windows or Mac to install it on.
If you have a simple return and want to file for free you can fill out the forms by hand. Here are some basic forms.....
Here is the 2023 1040 return
https://www.irs.gov/pub/irs-prior/f1040--2023.pdf
or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-prior/f1040s--2023.pdf
2023 1040 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2023.pdf
2023 EIC and Tax Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2023.pdf
Schedules 1-3
https://www.irs.gov/pub/irs-prior/f1040s1--2023.pdf
https://www.irs.gov/pub/irs-prior/f1040s2--2023.pdf
https://www.irs.gov/pub/irs-prior/f1040s3--2023.pdf
Don’t forget your state. And you will have to print and mail your returns. So be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
Then when you file for 2024 you need to enter 0 for the 2023 AGI since you are filing 2023 late.
If you want to prepare your 2023 tax return using TurboTax you will have to use TurboTax Desktop. If you started your 2023 return in TurboTax Online, but never filed it, see the following TurboTax Help Article: How do I finish a prior-year return that I started in TurboTax Online?