A tax return check is a process in which the Internal Revenue Service (IRS) reviews a taxpayer's financial records to ensure that all taxes have been paid correctly. The AUDIT, which is a five-letter word, is the process of verifying the accuracy of the information provided on the tax return. It involves examining documents and records to make sure that all income, deductions, and credits are reported accurately. The IRS may also use other methods to verify the accuracy of the information, such as interviewing the taxpayer or conducting an on-site inspection.