Tax Tool

IRS Notice Decoder

Look up common IRS notice numbers and understand what the letter may be asking you to do.

Before you use this tool

Use this as a first pass when you receive a CP14, CP501, CP503, CP504, LT11, Letter 1058, or CP2000 notice.

Notice number

Notice date

Response deadline

Tax year

Balance shown

Any appeal or levy language

IRS Notice Decoder

Enter the notice number from the top right or header area of your IRS letter.

Notice numberBalance shown on noticeResponse deadline, if shownAll returns filed?

Serious collection notice

CP504 intent to levy state refund or property

Act quickly. Review the deadline, gather account records, and consider professional help if you cannot resolve the balance.

Notice balance entered: $15,000. Write down any deadline before calling or mailing a response.

Professional review is strongly worth considering when the notice mentions levy rights, final notice language, or hearing deadlines.

How to read the result

The output is a planning screen. It can help you spot questions to answer, records to gather, and situations where a simple online step may not be enough.

Confirm numbers against official IRS records before sending money, filing a form, requesting relief, or making a deadline-sensitive decision.

This tool provides an educational estimate only. It does not replace IRS records, filed tax returns, official IRS systems, or advice from a qualified tax professional.