Are they both online returns? Did you use two accounts (hopefully)? You can only prepare 1 Federal return per account per year. Hopefully, you used two different accounts (User IDs). If so, and you can't find the account with the other return, here's how to look for multiple accounts.
You can have up to 5 accounts that use the same
email address for notification purposes. A User ID may be an email
address, but it doesn't have to be. It might be only part of an email
address, or it can be anything at all.
To
get a list of your User IDs and recover account access, you can use the
tool at the link below. Try using your phone number first. After
that, if necessary, then run the tool on your email address(es) you can
access.
NOTE: Before running the
account recovery tool below, log out of all Intuit accounts including
this user forum, or you might end up in a loop. Then clear your browser
Internet cache, close your browser, then reopen it, and go to the link
below. You may wish to copy this link so you can paste it into the new browser session.
https://myturbotax.intuit.com/account-recoveryIf
still no luck after running that on your phone number and email
address(es) that you can access, here's another method.
Go back to the tool again, but
this time leave the data field blank, and choose the
small blue link that says
"Try something else", and it will look you up by SSN and other parameters.