When you owe IRS tax debt, one of the first things you need to know is which collections department has your case. Each works differently, and that changes your strategy. ✔️ ACS (Automated Collection System): Most cases start here. Easier to manage but they can file liens and levies. ✔️ Special Compliance: Handles bigger balances, self-employed, or older debt. Think of it as ACS 2.0. ✔️ Private Collection Agencies: No real power, just calls and letters. Best move is often sending the case back t