 CBS News has learned that former President Donald Trump is now citing that ruling in an effort to get Judge Juan Merchan to set aside the verdict in his New York criminal case. CBS News special report. I'm Jennifer Kuiper. The IRS is the most powerful collection agency on earth. And if you owe back taxes, the news isn't good. The IRS has raised the interest rate it charges on unpaid taxes in recent years. This hits hard if you're behind on your taxes. Most people don't know it, but the IRS adds interest.