How do I add a comment to stock section or W2? IRS is confused because taxes were already paid in W2. RSU’s sold are now listed on 1099.

We have Restricted stock units(rsu) vest each quarter and certain amount sold immediately to cover the taxes.  This is reported in the W2 by the company.  Last year the RSU’s sold were listed on the 1099.   IRS thinks we did not pay the taxes.  I want to put a comment in the W2 section or stock section this year notifying them where the taxes for those RSU’s are accounted for.