W2 lists only one state but I lived in two states

For the 2025 tax year, I lived in Virginia for 9 months (Jan-Sept), and Washington DC (my current address) for 3 months (Oct-Dec).  I worked for the same employer during the entire year.  However, my W2 only lists Virginia in in the state information boxes 15-17.  The Virginia state wages in box 16 are the same as my total wages shown in box 1 (so witholding taxes were only paid to Virgnia and nothing was paid to Washington DC).

I don't know how to go forward with this, do I somehow fix on the federal forms, or try to fix on the state forms? I did try on the state forms, but I must have done something wrong because I can't get them to state I was (am) a part-year resident for both states.  thanks.