A customized module is being implemented in an off-the-shelf ERP solution. Scope is defined and user acceptance testing is about to begin, but a new government introduced major tax reforms. What should the project manager do?

The correct answer is to assess the potential impact with the project team. Major tax reforms are a significant external change that could directly affect the customized ERP module, potentially rendering it non-compliant or requiring substantial rework. The project manager's immediate responsibility is to understand the implications of this change on the project scope, schedule, cost, and quality. This assessment should involve the project team, including subject matter experts, to determine the necessary adjustments. Contacting the finance team for advice is a good subsequent step, but the project team needs to first understand the technical and functional implications. Pausing the project indefinitely is premature and could lead to unnecessary delays and costs without a clear understanding of the situation. Proceeding with user acceptance testing as planned would be risky, as the module might be tested against outdated requirements, leading to rework later.