Get Answers

Return to audits

IRS Notice CP503

Second reminder, You have unpaid taxes

Each year, millions of taxpayers are faced with a tax bill they can't afford to pay. If the IRS is sending you notices about unpaid taxes, it's best to respond quickly. Let the experts at H&R Block identify your best plan of action and help you address the issue so it doesn't get worse.

What happened?

  1. The IRS sent a second notice about unpaid taxes you owe, but the IRS never received a response.
  2. The IRS sent CP503 to request payment for the unpaid tax balance. If you don't pay the full amount within 10 days, you will be charged additional penalties and interest.

How can H&R Block help?

  • When the IRS sends notices about a balance owed, it's important to respond quickly. H&R Block tax professionals understand the timelines for IRS collection activity, and we'll make sure you know the deadlines, too.
  • Depending on your situation, you might qualify for one or more payment arrangements with the IRS. We'll look into your tax situation and show you your best options.
  • If the IRS has assessed penalties, we will see whether you qualify to have them removed.

Have questions about a CP503 notice you received? Schedule a FREE consultation with an H&R Block tax professional today. We'll sit down to review your notice, answer your questions, and, if necessary, recommend next steps to get your issue resolved.

Ready to file?

You've got your forms. And we've got your back. There's only one thing left to do. Let's do this.


So how much will you get (or owe) this year? That’s the million-dollar question. We happen to have three very useful calculators to help you estimate your refund or balance due.

Need Live Support? 1-800-HRBLOCK (1-800-472-5625) or Find An Office