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Best answer by Celery63
Federal back taxes paid are not ever deductible.

State back taxes paid are deductible on your federal return in the year paid. But only the tax, not any penalties or interest.

Penalties and interest on back taxes are never deductible.

1 reply

Celery63Answer
June 3, 2019
Federal back taxes paid are not ever deductible.

State back taxes paid are deductible on your federal return in the year paid. But only the tax, not any penalties or interest.

Penalties and interest on back taxes are never deductible.