Marketplace›IRS letters
21 notices · from the agencies' own pages
Top right corner of the first page. Each guide gives the response window and the steps the IRS lists, nothing added. Or skip the reading: upload the letter and get a report by email in minutes.
The IRS matched your return against W-2s, 1099s and other forms it received and found a difference.
A bill for tax, penalty or interest the IRS says is unpaid.
Later letters in the balance-due series. These carry rights with short windows.
A correction the IRS made while processing, which changed your refund or balance.
The IRS holds your return until you confirm it was you who filed it.
The IRS is asking for documents behind an item on your return.
State notices follow their own windows and their own appeal form.
In the top right corner of the first page (sometimes the bottom right), next to the tax year and the date of the notice. It starts with CP or LT, or the letter says "Letter" followed by a number, such as Letter 5071C.
IRS notices arrive by mail with a notice number, your name and a tax year. The IRS does not start contact by text, email or social media and does not ask for payment by gift card. Check the number on irs.gov before you respond.
You upload the letter and get a report by email in minutes: what the letter says, what it asks for, the deadline printed on it, what to gather, and what to ask a professional if you need one. No account, no phone number.
No. Nothing about your request reaches any firm unless you ask for that on your report. If you do, you choose whom to contact; TaxScout lists tax professionals from public IRS records.
Not tax advice. Deadlines and steps are quoted from IRS.gov and Mass.gov pages read on 2026-10-19; the letter in your hand controls.