How do I find out how much back taxes I owe?

To find out how much back taxes you owe, start by checking your tax returns for the years in question, as they will detail your reported income and any taxes owed. You can also request a tax account transcript from the IRS, which provides a summary of your tax history, including any outstanding balances. Additionally, consider contacting your state’s tax agency for state tax obligations. If you're unsure, consulting a tax professional can help clarify your situation.