Hello I made a mistake and hit no one can claim me. I am trying to fix it.

To change this information, please go back to the "My Info" section in TurboTax and check the box to indicate that "Another taxpayer can claim me as a dependent on their tax return" and then answer "Yes" to Will this person claim you on their 2024 tax return?  

If you already filed your return and it rejected, you can change the information as described above and then refile.

If you already filed and your return was accepted, you will need to Amend your return.

So did their return reject because you claimed yourself?   They don't have to wait for you to amend.  They will have to print and mail their return this year.  Once a ssn has been used you can't efile it again.