Senators Max Baucus and Orrin Hatch are not happy with the IRS.

The two senators, who are the Senate finance committee chairman and ranking member respectively, sent a letter back in May to the IRS that contained 41 questions regarding the Inspector general report that outlined how the IRS had targeted tea party groups. To date, according to Baucus and Hatch’s offices, the IRS has given incomplete answers to thirteen of the questions — and hasn’t even bothered to answer ten of the questions.

“The IRS needs to be more cooperative in providing us with the documents needed to fully carry out this investigation,” Baucus and Hatch said in a joint statement.

In the May letter, Baucus and Hatch had requested that the IRS respond by May 31.