If your return was rejected, you can sign back into your return, make the corrections and e-file again. However, if e-filing is not an option, follow these instructions (click on the 'Instructions' link in the FAQ) and TurboTax will provide you with mailing instructions (the address depends on where you live).
Where do I mail my tax forms?
https://ttlc.intuit.com/replies/3401713
