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Notice code 42
Notice code 42 — We found an error in the computation of the marital deduction on Schedule A.
What this IRS notice code means, and what to check before you reply.
What to do next
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42
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What the IRS language says
We found an error in the computation of the marital deduction on Schedule A.
What it usually means
42 is in our IR Manual catalog. Official wording is dense — we translate it for business owners and individuals and map realistic next steps.
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