As indicated by DoninGA if you know your return is not correct then you should amend it immediately. This letter, 4464-C, is about verifying your income and income tax withholding. For more information, use this link from the IRS that addresses this letter specifically.
You will be able to access and file an amended return now (Form 1040-X).
Be sure to read all the instructions carefully, before you begin, so that TurboTax knows the original numbers and the changed numbers for your amendment.
@MichWilliams94
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
