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State tax filing

No. DC has no nonresident state income tax filing requirement so you will only need to report your DC-sourced income on your CA resident state income tax return.

You are not required to file a DC return if you are a nonresident of DC unless you are claiming a refund of DC taxes withheld or DC estimated taxes paid. Use Form D-40B, Non-Resident Request for Refund (available by visiting http://otr.cfo.dc.gov/node/379192).