Employer is incorporated in VA but I never physically worked there -- how to answer an income question

I am filling out a non-resident VA state return. I live in Ks. and work door to door sales and have worked in several states.  Box 16 on my VA W2 has my "State Wages, Tips, Etc." as $30,114... even though we never have physically worked in VA. My assumption is that this is in box 16 due to my employer being incorporated in VA.  They did withhold VA state taxes -- box 17 has $1290.  Now I'm being asked "VA wages, salaries, tips (if different)" than the $30,114 that's in box 16.  What do I put here?  $0 since I never PHYSICALLY worked in VA?  Or put the $30,114 simply because my employer was incorporated in VA, which I guess then makes my $13,114 "VA Source" income".  This all gets SO confusing when employers become incorporated in other states and they don't put the actual state where we did most of our work on the W2. Why put VA when we never physically worked in that state?  That seems almost negligent on the employer's part. My hubby works for Pfizer and they are incorporated in NY, but they correctly put the state of KS on W2.  Common sense to me.  Arrgghh.....