After you file

@Santana3 You have provided no details so we do not know why you are sending a letter to the IRS, or who at the IRS told you to do so.   Did you receive a letter FROM the IRS that asked for information from your employer?   In general, if you are trying to fix a mistake that  was made on the tax return you filed, you need to wait for the return to be fully processed by the IRS and then file an amended return on a special form for that called a 1040X.    Unless you are leaving out some important details of what you did when you filed and why you talked to the IRS it sounds like you either got bad advice or misunderstood what was said to you.   Good luck.

**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.**