Which option describes the information that should be gathered from taxpayers?

Gathering all necessary tax-related information from taxpayers is essential for accurately preparing their tax returns. This includes not just income data but also deductions, credits, personal information, and any relevant financial documents. Comprehensive information allows for a complete assessment of the taxpayer's situation, ensuring that all applicable tax rules are applied effectively. By considering all aspects of their financial and personal status, tax preparers can maximize potential deductions and minimize tax liabilities, resulting in a more favorable tax outcome for the taxpayer.

Focusing solely on relevant income data, personal contact information, or annual earnings limits the ability to provide thorough tax support, as these elements do not account for the entire financial picture that influences tax obligations and benefits.