I have previous w2’s from 2023 and 2024 that I need to file with 2 dependents to claim on them

[VolvoGirl]

You need to do each year separately.  Sorry, Online is only for 2025 now. Online for 2024 and prior is closed now so you can not start a new 2024 or prior return or finish one. You have to do each year separately

How to prepare a prior year return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25...

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 Windows 10 or Mac Ventura 13 to install it on.

If you can't install the Desktop program or if you have a simple return and want to file for free, you can fill out the blank IRS forms by hand. Here are some basic forms…..

Here is the IRS 2024 Form 1040
https://www.irs.gov/pub/irs-prior/f1040--2024.pdf

OR if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-prior/f1040s--2024.pdf

And 2024 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2024.pdf

Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2024.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2024.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2024.pdf

Then when you do file 2025 enter 0 for the 2024 AGI since you are filing 2024 late.

You have to print and mail prior year returns. 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 UPS or certified mail so you will know the IRS received the return. Don’t forget state.

2023

Here is the IRS 2023 Form 1040
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

And 2023 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2023.pdf

2023 Tax and EIC Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2023.pdf

Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2023.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2023.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2023.pdf

[NicolleR1 · Accepted solution]

TurboTax Online and the mobile app are only available for the current tax year. 

To file a prior-year tax return for 2023 and 2024, you will need to purchase and download that year's software File your 2023 and 2024 taxes 

To prepare a prior year return see the link below:

How do I file a prior-year tax return?

Then, print, sign, and mail your return to the IRS.

Be aware that you can not combine prior years income with your 2025. You need to prepare a separate tax return for each year that corresponds to those specific W-2.