Army Reservist moved to California from Colorado

[chihaitian]

I moved to California from Colorado in April. I am in the Army Reserve and work on a military base in California both as a Reservist and a full time civilian employee. Do I have to do a Colorado and California tax return? Why? How to differentiate between nonresident and part-year resident on either state?

[TomD8 · Accepted solution]

If you literally moved from CO to CA in 2019, then for 2019 you are a part-year resident of each state.

A non-resident is a person that lives in one state but has income from another.  For example, if I live in Oregon but work across the border in California, for state tax purposes I'm a resident of Oregon and a non-resident of California.