TurboTax gets no information from the IRS after you file your tax return. TT does not know anything about a letter the IRS is sending to you. How do you know you are getting a letter? Does the IRS refund site say they are mailing you a letter? Wait for the letter to see what it says, and then ask questions if you do not understand the letter.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
If you checked your status on the IRS website and it says that they issued a letter you should contact the IRS directly. Also Keep in mind that once your return is accepted for processing by the IRS and/or State we have no control over your return.