what change on the w-2c? if it's only social security and medicare wages and related withholding you do not need to amend. there also be other changes that do not require you to file an amended return.
a possibility is that you have multiple Turbotax accounts and you are in one from which you did not e-file.
to find the right account
https://ttlc.intuit.com/turbotax-support/en-us/help-article/security-risk/account-recovery-request-t...
