Please see the TurboTax FAQ's below for instructions on how to print your tax return, depending if you have already filed or not:
Can I print a copy of my TurboTax Online return before I file it?
https://ttlc.intuit.com/replies/3338601
How do I get a copy of a return I filed this year in TurboTax Online?
https://ttlc.intuit.com/replies/3301525