The IRS sent me a CP2000 notice proposing a massive tax increase based on stock sales I already reported, how do I clear up this severe matching error?

Question

Kohari Gonzalez Oneyear & Brown · Accepted Answer

A CP2000 notice like this often points to a mismatch between IRS records and the return, even when stock sales were already reported. The key details usually include the brokerage 1099 forms, the amounts and basis shown on the return, and whether the IRS is comparing the correct tax year or account. For an answer applied to your exact numbers, bring this question to a licensed KGOB CPA in a focused session and leave with a clear next step.