I started my return and got interrupted and had to log off; now I can't see it anywhere when I'm logged back in.

There are a few reasons you might not be able to find the TurboTax Online return you’re looking for.  Take a look at the article below for the various scenarios. 

https://turbotax.community.intuit.ca/questions/1190172-why-can-t-i-find-my-turbotax-online-return