Trump's lawyers called this accounting firm "negligent," but the IRS believed it ensured his taxes were accurate

When Congress' Joint Committee on Taxation investigated the IRS audits of Donald Trump's taxes, an agent's note in the review of Trump's 2017 filings stood out.

The IRS agent wrote that Trump "hires a professional accounting firm and Counsel to prepare and file tax return," and they "ensure" that Trump "properly reports all income and deduction items." 

Joint Committee staff were befuddled by the note, according to a report on the IRS' mandatory audit of the former president's taxes, published Tuesday by the House Ways and Means Committee.