You still will not be able to e-file this year, even if she amended her return to correct her mistake. The IRS does not update the system soon enough. You have no choice this time--you have to print sign and mail your 2018 return.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.
(If it is any comfort, teenagers and students with first jobs do this a LOT, and mess up their parents' ability to e-file. You are not alone.)
**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.**
