Taxpayer Accountability Act - Requires the Internal Revenue Service (IRS): (1) to provide a substantive written response (not merely an acknowledgment letter) to any written correspondence from a taxpayer not later than 30 days after receiving such correspondence; (2) within 30 days after disclosing taxpayer information to any federal, state, or local governmental entity, to provide to the taxpayer a written notification describing the information, to whom it was disclosed, and when it was disclosed; and (3) to conclude any audit of an individual taxpayer not later than 1 year after the audit is initiated and to not assess any tax with respect to such audit after it is concluded.