Before further tax-debt work, ask who would perform it, what the service covers and how responsibility is explained. A clear question can begin the discussion.
Understand the person and proposed task
Ask about the qualifications and authority relevant to the work actually offered, rather than rely only on a broad job title. IRS information on choosing a tax professional explains why credentials and service extent deserve attention. Keep the account concern separate from this service question: an unpaid balance still needs its own evidence. Clarify which work is proposed and whether any representation or additional authorization is part of that scope.
Make communication understandable before engagement
Ask how questions are handled, how requested evidence is provided and how progress would be recorded. Understand charges and responsibility for a later filing, response or request. Keep written terms so a conversation can be distinguished from work completed. If a particular source is missing, explain that honestly and ask why it matters to the task, allowing useful assistance to be considered without a perfect archive or an assumed account outcome.