How many years back taxes can you file?

In the United States, you can generally file back taxes for up to three years from the original due date of the return. If you are seeking a refund, you must file within this three-year window to claim it. However, there is no statute of limitations for the IRS to collect unpaid taxes, meaning you can owe taxes from any prior year indefinitely. It's advisable to consult with a tax professional for specific guidance regarding your situation.