No, my return was not sent - I had to look up my AGI from 2017. How to get back to my nearly completed, and already paid for, 2018 return?

I got my AGI from 2017 - now how do I get back to my 2018 returns so I can send and/or print them? Good suggestions but it didn't work. I need to get back to my 2018 return. Any more suggestions?