If the IRS has charged you a penalty, there are two main ways to get it removed: first-time penalty abatement and a reasonable cause waiver. First-time penalty abatement is available to taxpayers who have a clean compliance history — generally no penalties in the three years prior to the penalty year — and it applies to failure-to-file, failure-to-pay, and failure-to-deposit penalties. You don't have to prove why you were late; you simply need to meet the compliance history requirement, which makes it one of the easiest penalty relief options. A reasonable cause waiver requires you to explain and document why you failed to comply on time — common reasons include a natural disaster, serious illness, or relying on incorrect advice from a tax professional. First-time abatement is often faster and simpler, but reasonable cause is available even if you've had prior penalties and can apply to a wider range of circumstances.