Where do I sent my tax return to my zip is 37766. It's a regular return

If you are filing by mail, the address to send your federal tax return to depends on where you live and whether or not you are enclosing a payment. When you print your federal tax return, TurboTax will print a page of filing instructions with the address to send it to. You can also find the address on the IRS web site at the following link.

Where to File Paper Tax Returns With or Without a Payment

You do not send your state tax return to the same place as your federal tax return. Where to mail your state tax return depends on what state you are in. TurboTax will print a separate page of state filing instructions with the address to send it to, or check the tax web site for your state.

Where to mail federal paper returns

https://www.irs.gov/uac/where-to-file-paper-tax-returns-with-or-without-a-payment

AND DON'T FORGET TO SIGN IT IN INK!