UltraTax

UltraTax is a professional tax preparation software package used by accounting firms and tax professionals to prepare, validate, file, and manage tax returns for individuals and businesses. It is marketed by Thomson Reuters as part of the CS Professional Suite under the UltraTax brand. The software is designed to streamline federal and state tax compliance and integrates with other Thomson Reuters tools as well as third-party data sources.

UltraTax supports a wide range of return types, including individual Form 1040, corporate Form 1120, S corporation Form 1120S, partnership Form 1065, and various trusts and estates, along with multi-state filings. It includes e-filing capabilities, built-in depreciation and amortization calculations, and asset management features, as well as data import from commonly used accounting and bookkeeping systems such as QuickBooks. The product offers built-in checklists, error detection, and workflow automation to reduce manual data entry and improve accuracy. Document management, secure client portals, and e-signature support are available, along with practice management features such as engagement workflows and client notices.

UltraTax is widely adopted by mid-sized and larger CPA firms seeking scalable tax preparation, virtual document handling, and integrated tax planning tools. It competes with other professional tax software offerings such as ProSystem fx, Lacerte, and Drake Tax, depending on firm size and workflow preferences.