text:  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 charges to your tax debts daily. If you owe the IRS today, you'll owe even more tomorrow. And it doesn't stop until you get right with the IRS. The good news is getting right can start with one phone call to Optima Tax Relief.