Online tax preparation and e-filing for 2024 returns is now permanently closed. The system is in transition from 2024 to 2025.
Now it is too late to use online software or to e-file. If you have any changes/corrections at all to make to your 2024 return, you now have to complete it using desktop software, which you must download to a full PC or Mac (not to a mobile device). Then you need to print, sign and mail it.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/printers-printing/finish-prior-year-retu...
If you already paid for your online software you can ask customer support for a download of the desktop software.
They are available from 5 a.m. to 5 p.m. Pacific time Monday - Friday
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
Very very soon the online system will go through a phase where your files will be temporarily locked up--so get your return filed asap.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**