If your granddaughter had no income why did she file a tax return? Now that her SSN has been put into the system, you cannot e-file a return that claims her as your dependent. The system will not allow another return using her SSN to be e-filed. If you have not yet filed and need to claim her you will need to print, sign and mail your own return.
If you already filed and did not claim your granddaughter, then you can amend after the IRS has fully processed your return. If she is your dependent then you can also use the education credit. A dependent cannot claim an education credit.
See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-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.**
