Notice code 339 (1040-SS) — We didn’t allow part or all of your additional child tax credit on line 9 of your Form 1040-SS. One …

We didn’t allow part or all of your additional child tax credit on line 9 of your Form 1040-SS. One or more of your children exceeds the age limitation.

What this notice is saying

Use the free strategy session if the letter is unclear, high dollar, or collection language appears.

Read the deadline

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Match the facts

Compare the notice to your return, books, and third-party forms before you reply.

Pick a path

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Keep books honest

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What to do next

Practical steps before fear takes the wheel. Bound from irs_notice.what_to_do.

Immediate steps

Resolves at publish from the catalog row.

What the IRS language says

We didn’t allow part or all of your additional child tax credit on line 9 of your Form 1040-SS. One or more of your children exceeds the age limitation.

What it usually means

339 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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