How are capital gain taxes applied to multiple state filings

[KeithDdenver]

Had a major capital gain from a sale of primary residence in California.  Now residing in Colorado.  Are we taxed multiple times by each state? Is the state portion of capital gains divided/determined by date of residency?  A little lost here.

[CatinaT1 · Accepted solution]

Since the gain was from a California property, it would be California source income.

You will want to complete your California return first.  You will be taxed on your California Source income.  Colorado will tax your entire income, but you will then get credit for taxes paid to another state.