Say which part you need explained
Use (855) 494-5639 to talk about your balance or notice. Start with the year and the question you have, even if you cannot yet explain every figure. Keep available correspondence close by so the wording can guide the conversation. If payment is the difficulty, describe that concern separately from any uncertainty about the amount.
Ask what happens after the conversation
Discuss the proposed review, required records, responsible person, and terms before authorizing work. Keep any official response instructions available. Keep returns and identity documents in your own records while the service and document request are clarified. Confirm the exchange method and recipient if records are needed later. A useful next step identifies the task rather than assuming that the call itself changed the tax account.