Can I redo my taxes. They’re keep getting rejected and idk why. I did my taxes last year but I forgot to mail it. I didn’t know. What can I do.

The reject email should say why or give you a reject code.   Did you enter the AGI from 2023?   If you never filed or mailed 2023 then enter 0 for the AGI.   That usually fixes it.  If you can’t get it to efile you will have to print and mail it.