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[kelzhang]

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[MaryK4]

You can only take the foreign tax credit OR deduction on the federal return, not both.  See Foreign Tax Credit – Choosing to take credit or deduction.

There is no comparable tax credit or exclusion for foreign income for the District of Columbia.

[pk]

@kelzhang  States in general do NOT recognize  tax treaties between US and  "other Contracting" countries.  Some state  ( NY, MI for example ) have their own treaties  with foreign countries .

Foreign tax credit not recognized by the states, but they usually  tax you on world income.