The term 'tax burden' refers to the amount of taxes that an individual or business must pay. The two crossword solutions for this term are 'AUDIT' and 'IRSAudit'. An AUDIT is an official examination of a company's financial records, which is usually conducted by an independent third party. An IRS AUDIT is an AUDIT conducted by the Internal Revenue Service (IRS) in order to verify that a taxpayer has accurately reported their income and paid the correct amount of taxes.