; and (II) the period consisting of the current fiscal year through the fiscal year ending with fiscal year 2031 (if such period includes any period not described in subclause (I)); (ii) contains the information described in subparagraph (B); (iii) has been reviewed by— (I) the Internal Revenue Service Advisory Council; (II) the Comptroller of the United States; (III) the National Taxpayer Advocate; and (IV) the Director of the Office of Management and Budget; and (iv) has been approved by the Director of the Office of Management and Budget. (B) Plan contents The information described in this paragraph is the following: (i) A detailed explanation of the plan, including— (I) costs and results to date, actual expenditures of the prior fiscal year, actual and expected expenditures of the current fiscal year, upcoming deliverables and expected costs, and total expenditures; (II) clearly defined objectives, timelines, and metrics for quantitatively measuring the plan’s annual progress, including with respect to measuring improvements in taxpayer services, revenue collection, information technology, cybersecurity, and taxpayer data protections; and (III) a description of any differences between metrics described in subclause (II) and corresponding metrics used by the National Taxpayer Advocate, the Comptroller General of the United States, and the Treasury Inspector General for Tax Administration. (ii) A detailed analysis of the performance of the Internal Revenue Service with respect to the delivery of taxpayer services, including— (I) the Level of Service (LOS) of phone lines (as a percent of phone calls answered by an Internal Revenue Service employee, not to include courtesy disconnects or automated call backs); (II) the median and average wait time to speak to a representative of the Internal Revenue Service; (III) the amount of unprocessed taxpayer correspondence, including tax returns, responses to Internal Revenue Service notices, tax payments, and other similar types of correspondence