CP200 for share sale to cover taxes

Hi forum,

I am hoping someone can help me soon with my question.

I received a CP2000 yesterday for my 2018 tax return showing that I did not report shares sold and includes a huge penalty and interest. However, the shares sold were to cover taxes on the vested RSUs. I did not sell any of the vested RSUs in 2018. What is the best way to address this with the IRS? Do I have to pay taxes, penalty and interest in this situation?

 

Thanks in advance for your guidance.

- WorriedTaxPayer