Point to the line that needs review
Have the relevant return period, notice number, and source record available. Describe what differs between the documents without deciding the answer in advance. If a corrected statement or payment confirmation is part of the question, name the version and date so the discussion begins with evidence rather than a broad account worry.
Clarify the review before a handoff
Use the telephone contact to talk about the issue and ask what record would be examined next, who would perform proposed work, and how its scope and fees are stated. Confirm the recipient and transfer method before sharing private pages. Keep the notice’s official response instructions with your notes, and record the next task instead of assuming that an introductory discussion completes the required action.
Preserve the version and date of each source, and leave an unresolved difference as a question for review.