For years, the N.F.L. has disclosed the commissioner’s salary, which is now approaching $10 million a year, on an annual federal tax filing.

Such information must be made public through the I.R.S. Form 990 because the N.F.L. headquarters in New York has nonprofit status, akin to a chamber of commerce. The tax code requires nonprofit organizations to disclose names and salaries of “key employees.” The N.F.L. considers its commissioner the only individual who fits that definition.

In recent years, however, the Internal Revenue Service has proposed new rules to require most of the nation’s more than 1.6 million tax-exempt organizations to disclose much more information, including salaries of many more key employees. The rules go into effect this year, and the N.F.L. is pushing back.

The league is asking Congress for an exception to the requirement of publicly disclosing the names and salaries of employees at N.F.L. headquarters who make more than $150,000 a year.