That may reduce the criticism the league takes for being a tax-exempt organization, but more important to the league, it removes the requirement that the NFL disclose the compensation of Commissioner Roger Goodell and other top executives. So Goodell’s salary will no longer be public record.
Although the league has been classified as a tax-exempt organization, the 32 teams are all taxable, for-profit businesses, which means the money made by the league is taxed. This move will not affect the tax burden faced by the teams.
NFL will give up its tax-exempt status | ProFootballTalk