https://www.irs.gov/individuals/understanding-your-cp23-notice
If you have bank and/or credit card statements showing the amount of tax you paid then follow the instructions on the CP23 notice to contact the IRS. The letter contains an 800 number for you to use.
**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.**
