@kyleadrian30 H&RB is correct, your Mom has to mail her taxes in. She can no longer efile*. But, she should claim you as a dependent, on her mailed in return.
In the mean time, you should file an amended return to unclaim yourself. But, Mom does not have to wait for you to do so.
*Technically, she can e-file after your amended return is fully processed, But that will be 4 months or more from now. Paper filing will, more likely, get her refund in 2 months.
