Drake Tax
Professional tax preparation software for small and mid-size firms
Paid
Tax & Accounting
Preparers enter data, run diagnostics, and e-file federal and state returns. Features include document management and client portals. It is known for good value and support.
It is licensed per firm, and is aimed at professionals rather than consumers.
Intuit Lacerte and UltraTax are alternatives. Drake Tax suits tax professionals at smaller firms.