2020 bonus received in 2021 was reported to the state based on hours worked in 2020?

[ggsz28]

Not easy to summarize this in the subject line. My job requires time spent in both KS and MO at various locations. In 2021 I spent the entire time working in KS. I received an annual bonus in March 2021 and my 2021 W2 is showing wages in MO due to a portion of the bonus being attributed to time spent in MO. When I asked our payroll dept they said that the bonus is based on the time distribution from 2020...so if I worked 20% of my hours in MO in '20 then 20% of the bonus received in March '21 is reported as MO income. Is that right?

[Vanessa A]

Yes, that is correct.  If your bonus is based on your overall hours and you worked a portion of those hours in one state and the rest in another, you would have to file taxes in both states because the money was technically earned in that state. 

[ggsz28]

Thanks. I just assumed reported wages for the year had to reflect where you worked during that filing year but apparently not.