When you print out your return it will print with mailing instructions. Pay attention to the separate addresses you use for federal and state returns--they do not go to the same place.
For your federal return:
https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
We do not know where you need to mail your state return since you have not told us what state so you can look that up yourself:
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return.
https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online