Can I allocate wages to states differently when filing state tax returns than what is shown on my w-2? Moved states keeping same employer, but updated address 6m later.

Because I was late in updating my address with my employer, the allocation of my wages between states is shown incorrectly on my w-2.  do i need to contact my employer to issue a corrected w-2 or can I just allocate my wages differently when I file my state tax returns?