What happened? Did you say that you cannot be claimed as someone else's dependent? And is your mom trying to e-file her own return that claims you as her dependent? That is a common mistake made by young tax filers who do not understand the importance of answering that question in My Info correctly.
If your mom's return being rejected now? If you said you could not be claimed and she is claiming you she cannot e-file this year at all. She now has to print sign and mail her own return. Even if you amend your return, the amended return will never "catch up" in the system to allow your mother to e-file.
Mom does not need to wait for you to amend. It will not help her. She has to file by mail. It will take longer for her return to be processed by the IRS now.
When the 1040X is available at the end of March, that is when you can amend your own return.
Here is a link with information about answering the question in My Info when you can be claimed as someone else's dependent:
https://ttlc.intuit.com/community/dependents/help/when-do-i-have-to-answer-yes-to-being-claimed-as-a...
**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.**
