Can I e-file now and print later?
Yes. When you sign into your account after filing, you will have the option to print your return.
How to get a copy after filing
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-get-a-copy-of-a-return-i-filed-this-year-in-turbotax-online/00/25932