I withdrew an amount equal to the contributions I made to a Roth IRA (I'm 30). I don't think I owe taxes when withdrawing contributions, but TurboTax is saying I do.

You will need to answer the Roth follow-up questions in the retirement section and enter the net contributions prior to 2024.

1. Login to your TurboTax Account 
2. Click on "Search" on the top and type “1099-R” 
3. Click on “Jump to 1099-R” and enter all your 1099-Rs
4. Click "Continue" on the "Review your 1099-R info" screen after you entered all you Form 1099-R
5. Answer "Owned Any Roth IRA for Five Years?" screen
6. Continue through the questions and make sure you enter the net contributions prior to 2024 on the "Enter Prior Year Roth IRA Contributions" screen 

If you made Roth IRA contributions for 2024 then you will need to enter them in the IRA contribution section:

1. Click on "Search" on the top right and type “IRA contributions” 
2. Click on “Jump to IRA contributions"
3. Select “Roth IRA”