The email for the identity verification code is not coming through. I can't complete my return without as it doesn't give me any other options for verification

If you are using gmail, in the search box at the top of gmail type in TURBOTAX and do a search. Sometimes gmail hides things. If that doesn't work see below.

Sign in help page 

select "try something else". 

Here are two FAQs to help: What if I'm having trouble with my filing verification code? and How do I get a verification code if the email address is wrong?