TurboTax does not support Form 8833 (Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b)) you cannot e-file. Yo can prepare your return on TurboTax, print it and print a copy of Form 8833 (see link below), fill it out and mail it all to the IRS.
IRS Form 8833 Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b)
IRS Mailing Addresses: Where to File Paper Tax Returns With or Without a Payment