Identify the proposed difference
A CP2000-series notice explains proposed changes arising from a mismatch between information reported to the IRS and a return. Read the entire document and locate the affected tax period and item. Keep the proposed explanation separate from assumptions about what has already been decided or how the account will ultimately be resolved.
Compare the relevant versions
Place the filed return and the source statement beside the notice’s item. If a corrected statement exists, preserve both versions and identify the change clearly. Note whether the difference can be explained by the records available or whether another source is needed. A comparison sheet should expose the question rather than force the documents into agreement.
Use the notice’s response route
Follow the instructions applicable to the actual communication, including its stated response requirements. Discuss how any correction question relates to that process before assuming a separate amended return is the right next step. Retain the supporting packet, the final response version, and submission evidence. A professional review should explain the reasoning and responsibilities without promising that the proposed change will disappear.
Preserve the version and date of each source, and leave an unresolved difference as a question for review.