Yes, your mom will need to file a paper return because hers will be rejected saying you have already been a primary tax payer on another return. There is no way to get around the e-file system once you have already filed and claimed yourself.
You will need to amend your return to indicate someone else is claiming you.
See this TurboTax FAQ for help with amending.
This article will give your mom instruction on how to print and mail her return.
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