Educational information · Sources checked October 27, 2026 · Read the deadline on your own notice.
The notice number is a starting point
Find the CP or letter number near the top of your notice. Compare the notice with the IRS’s official explanation, verify the tax year and amount, and read all response instructions. Do not send us a copy containing sensitive information.
Notices do not always follow a fixed sequence. A lien notice is not simply a later stage of every levy process. The actual notice and case history matter.
Got a letter from the IRS?
Start with the notice number in the top corner.
CP2000: a proposed change
A CP2000 generally identifies a difference between information the IRS received and information on a return. It is not a bill. Read the proposed adjustment and response instructions, whether you agree or disagree.
CP14, CP501, and CP503: balances and reminders
CP14 generally explains a balance due. CP501 and CP503 concern an unpaid balance. Check for payments already made, the relevant tax year, and the response instructions before choosing a next step.
CP504: intent to levy
This notice concerns unpaid tax and potential collection action. State refund levies and other levy rules have different notice requirements and exceptions. Respond using your actual notice rather than relying on a simplified countdown or generic timeline.
LT11 or Letter 1058: levy and hearing rights
These notices generally explain intent to levy and your right to request a Collection Due Process hearing. The hearing request deadline matters. Use the date and instructions on your notice, and seek qualified help promptly if needed.
Letter 3172: a filed federal tax lien notice
This concerns the filing of a Notice of Federal Tax Lien and hearing rights. A lien is a claim against property; a levy is a seizure. They are not the same action.
Not sure what you received?
Use the IRS notice search and official contact instructions. An inquiry through our website does not notify the IRS or extend your deadline.