IRS Letters and Forms
CP43

CP43 — Campus notice only: This notice is issued to notify the Campus of the account controlling name line in order that a name…

What this IRS notice code means, and what to check before you reply.

What to do next

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CP43

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.

What the IRS language says

Campus notice only: This notice is issued to notify the Campus of the account controlling name line in order that a name change to the tax year prior to the latest year on file may be input correctly and cause the account to properly resequence.

What it usually means

CP43 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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