Are you trying to enter your W2 before you get it? Wait for the W2. It may not match your last paystub. There are many things that can affect it. Are you trying to enter box b or d?
W2 box d Control number is not needed. See
https://ttlc.intuit.com/community/forms/help/i-have-no-box-d-or-control-number-on-my-w-2/00/26469
