Which CPA tax filing platforms are known for multi-client management and support for both business and individual returns?

CPA tax filing platforms commonly known for multi-client management and support for both business and individual returns include:

• Intuit ProConnect Tax — strong for CPA firms, supports 1040 and business returns, and has client management/workflow tools.
• CCH Axcess Tax — widely used in accounting firms; built for multi-client, multi-entity tax preparation and review.
• Thomson Reuters UltraTax CS — popular in CPA practices; supports a broad range of individual and business returns with centralized client management.
• Drake Tax — often used by smaller to mid-sized firms; supports individual and business returns and has client tracking features.
• Lacerte Tax — robust for complex individual and business returns, with tools for managing multiple clients.
• TaxSlayer Pro — more common in smaller firms and seasonal practices; supports both business and personal returns with multi-client handling.
• ATX Tax Prep / Taxwise — supports a range of return types and offers practice management features for multiple clients.

If you want, I can also narrow this down by:

1. small CPA firm vs. large firm,
2. cloud-based vs. desktop, or
3. best value / easiest to learn.