When a business wants to change an accounting method for tax reporting, such as the cost-flow method used for inventory, what body must give permission for the change?

Internal revenue service must give permission for the change

Explanation:

The Internal Revenue Service is the federal government's income service. The government agency is a division of the Administration of the Treasury and is subsequently headed by the Internal Revenue Commissioner, designated by the President of the United States for a term of five years.

An adjustment in the accounting method of a company includes a change in its overall plan to pay for gross income or expenses (cash or accumulation methods).

They usually have to request permission to do this by filing Form 3115 with either the International Relations Service if they want to change from the accumulation accounting method to the cash accounting rules.