Which type of tax service is organized by subject to provide relevant supporting documents?

The correct choice is topical tax service. This type of service is specifically designed to organize tax information by subject matter, making it easier for users to find relevant supporting documents related to specific tax issues or topics. By categorizing information topically, a topical tax service helps individuals and professionals access pertinent resources quickly, which can be crucial when preparing tax returns or conducting tax research.

The organization of documents by subject allows for a more streamlined approach to tax-related inquiries, enabling users to effectively navigate complex tax regulations and compliance requirements. As a result, topical tax services can enhance the efficiency and accuracy of tax planning and filing processes.

In contrast, while comprehensive tax services may provide a wide array of tax-related information, they do not necessarily focus on organizing that information by specific subjects. Standard tax documentation may refer to the specific documents needed for tax filing but does not address the organization of those documents by topic. Guided tax assistance might suggest various resources and offer help, but it does not imply the systematic organization of documentation by subject matter as a topical tax service does.