"Thank you! One of the payroll team told me that my W-2 is correct, which also confused me. I am doubling check with them. My base salary is 10000, RSU income is 5000, but the Box-1 is ~10000 while Gross Pay is ~15000. "
I continue to be confused. $20 x 1,000 (your figures) = $20,000 and if those shares vested in 2020 Box 1 should equal $10,000 + $20,000 = $30,000. I can't get "$5,000" from anything you've posted. I think you're misunderstanding something. RSU income is fully taxable when the shares become yours.
