What kind of 1099 do you have? There are 21 different kinds. There is no plain Form 1099. All 1099 forms have one or more letters after the 1099. The most common are 1099-INT, 1099-DIV, 1099-B, 1099-NEC, 1099-R, and 1099-G.
Where exactly on the 1099 form does it say California or CA?
Investment income, on a 1099-INT, 1099-DIV, 1099-OID, or 1099-B is considered income from the state that you lived in when you received the income, no matter where the account or payer is located. The same is true for retirement income on a 1099-R. You only pay tax on it to the state that you lived in.
The situation might be different for other kinds of 1099 forms.
