What belongs in the opening explanation?
Say which years you know are involved, which letter arrived most recently, and the issue making the debt difficult to address. Mention any unresolved return or payment questions without assuming they have the same cause. This gives the proposed review a starting point and avoids choosing an IRS process from an incomplete combined figure.
What should the service explain?
Ask how the covered periods will be reviewed, which tasks are proposed first, and what supporting information is required. Service fees and responsibilities should be described for that scope. Where an IRS application or response is involved, understand who prepares it, how you review it, and what evidence of actual submission would be kept. A broad label of resolution should not leave those details unanswered.
How are options assessed?
Payment and relief processes have their own current requirements and may depend on filing and financial facts. The applicable approach must be examined for the actual account rather than assumed from the number of years involved. Keep subsequent correspondence connected to the relevant period. A useful conversation defines the next question and responsibility without promising that an IRS request will be accepted.