Understanding your CP521 Notice
This notice is to remind you that you have an installment agreement payment due. Please send your payment immediately.
What you need to do
- Read your notice carefully — it is a reminder to send in your monthly payment.
- Make your payment by your due date. Go to the payments page to find out more about your payment options.
You may want to...
- Download copies of the following materials that may be helpful:
- Call 1-800-TAX-FORM (1-800-829-3676) to have forms and publications mailed to you.
Answers to Common Questions
What is the notice telling me?
This notice is telling you that you that your monthly installment agreement payment is due to us by a specific date.
What do I have to do?
Pay the amount due shown on the notice. Mail us your payment in the envelope we sent you. Include the bottom part of the notice to make sure we correctly credit your account.
What happens if I don't pay?
If you don't send us a payment, the interest and penalties you'll have to pay will increase and you could default on your installment agreement.
Who should I contact?
If you have any questions about the notice, call us at the number printed at the top of the notice. A customer service representative will assist you.