Revenue Agent's Report (RAR) Changes to an assessment after examination by an IRS agent. The changes are recorded on form 4549. Investopedia Says: This isn't always bad news. If you were over-assessed (over-taxed) you'll be compensated. However, if the report declares a deficient assessment (you paid too little), then it is usually not the most pleasant news in the world... Related Terms: Audit IRS Loophole Notice of Seizure Office Audit Taxes |