"No grant of RSU in 2020. Just vested 1000 RSU, not sold/exercised. "
"Exercised" isn't a word typically used in an RSU situation. IF they vest THEN they are yours. If this was really Restricted Stock then the grant would have happened some time in the past.
You're going to have to go to your payroll department and ask "Why isn't the $20,000 created by the vesting of the RSUs included in my taxable income? Everybody says it should be." (Copy this down and repeat it word for word.) If the payroll department tells you the presentation is correct and WHY it's presented this way, then ask them to write that down so your tax advisor can understand.
