An understandable review question names the source, period and uncertain point. It can begin a useful help discussion before the whole history is settled.
Give the uncertainty a precise subject
Say which amount, transaction or instruction you want explained and retain the received document. Distinguish the fact stated by the source from your possible interpretation. If another record differs, preserve what each actually shows rather than choose the more favorable account story. A clear question can address an evidence gap without a final theory, allowing proposed assistance to explain what information would make closer review useful.
Keep the requested next item tied to the question
Ask what work the service covers and why a particular source matters. Clarify charges and separate permission before proceeding. Record the purpose of further evidence and preserve actual notice directions for intended action. A meaningful follow-up should return to the account point that prompted concern, keeping a formal response or IRS result distinguishable from the preparation that made the question easier to discuss.