You can start with the current concern before every file is indexed or every account relationship is understood.
Give the opening a clear debt question
Say whether the issue is payment, an IRS letter or an unclear amount. Mention the period if known and keep the current source nearby where practical. Name missing evidence honestly instead of reconstructing its contents. The concern can begin the conversation before a complete archive is prepared or a particular process is selected, allowing proposed assistance to address the actual point that needs explanation.
An understandable reference keeps the original evidence available for a later explanation. It does not decide the meaning of an entry or supply missing account facts.
Make the next information request meaningful
Ask about work, terms and separate authorization where needed. Record why further evidence matters, using a reference that helps return to its original context later. Keep received IRS instructions for planned account action. A purposeful next task can make the following discussion useful without gathering every available document merely to enlarge the folder or treating an opening call as a formal determination already made.