IRS Tool or Letter: Business Filers

Search Business Notices and Letters
Enter your notice (CP) or letter (LT) number or a keyword in the box below, then click Search. You can also search by topic. You will be able to see what the paper copy of the letter looks like.
individual notices and letters

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Frequently Asked Questions

  • Where can I find my notice or letter number?The notice (CP) or letter (LTR) number is located on either the top or bottom right-hand corner of your correspondence.