The project manager should recognize the stakeholder's skills as an expert on taxes and evaluate the possibility of the stakeholder supporting the project team. This will help to leverage the stakeholder's knowledge and experience, as well as increase the stakeholder's engagement and satisfaction. The project manager should also communicate with the stakeholder and the project team to establish a clear and collaborative relationship. Requesting the functional manager, asking the project team, and sending a request to the project sponsor are not the best ways to leverage the stakeholder's information, as they may create unnecessary dependencies, conflicts, or delays. References:
* PMP Exam Content Outline, Domain II: Process, Task 3: Engage with stakeholders to meet expectations and foster collaboration.
* A Guide to the Project Management Body of Knowledge (PMBOK Guide), Seventh Edition, Chapter 2:
Value Delivery System, Section 2.4: Stakeholders, Page 38.
* Professional in Business Analysis (PBA) Certification Exam Outline, Domain II: Planning, Task 2:
Plan Stakeholder Engagement, Page 9.