I assume you are using the Online version? Click on Add a State to let you back into your return. Do not click on Amend, that is only for filed returns. After you edit your return you can print to mail it again or try to switch to efile.
https://ttlc.intuit.com/community/e-file/help/how-do-i-change-from-mail-to-e-file-in-turbotax-online/00/26985