What this IRS notice code means, and what to check before you reply.
Start with these steps before you reply.
Read the notice carefully and note any deadline. Gather returns, notices, and payment records. Book a free strategy session before responding if the amount is large, unclear, or collection language appears.
We changed the amount claimed as Child Tax Credit and/or Additional Child Tax Credit on page 2 of your tax return because there was an error on Schedule/Form 8812, Child Tax Credit. The error was in the: computation of the credit on Schedule/Form 8812 transfer of the amount to page 2 of your tax return and/or Schedule/Form 8812 was missing or incomplete.
628 is in our IR Manual catalog. Official wording is dense — we translate it for business owners and individuals and map realistic next steps.
Every notice in this library, sorted the way the IRS numbers them.