Find the key information
Locate the CP or LTR number, tax year, issue date, and response date. Read all pages, including an enclosure that explains rights or response procedures. Write the requested action in your own words. If you cannot explain it yet, search the notice number on IRS.gov and keep the official explanation alongside your copy of the letter.
Check the facts against your return
Match the letter to the return, income statement, and payment record for the same year. Underline a number that differs and write where your supporting figure came from. If you agree, follow the instructions; if you disagree, prepare the explanation and supporting copies the notice requests. Avoid sending unrelated documents that make the issue harder to understand.
Document what you do next
Record calls, submissions, and confirmation numbers. Keep a copy of the complete response and note how it was delivered. When consulting a provider, start with the deadline and notice number rather than only the balance. A clear record helps prevent duplicate submissions and gives you something concrete to review if another letter arrives about the same issue.
Your action checklist
Use the checks to plan. Do not send sensitive documents through this website.
Questions people ask
Do I always need to write back?
The notice controls the next action. Some letters need a response and others do not if you agree. Follow the notice-specific instructions instead of assuming every envelope is the same.
What if the letter seems fake?
Use official IRS contact information and notice guidance to verify it. Do not rely solely on a telephone number or link in an unexpected message.
Official resources
Agency rules and your facts control. Review current guidance before acting.