Supremo Tax Solutions (STS)
Supremo Tax Solutions(STS) is a leading provider of professional tax software solutions for professional tax preparers across the United States. Headquartered in Downey, CA with is dedicated to enabling our customers’ success with industry leading solutions for professional tax preparers.

Professional Tax Software for High-Volume Retail Tax Businesses
Whether you are a single office or a multi-site operation, your needs as a high-volume retail tax business are unique and we understand and applaud that.
- Financial Products
- Industry Leading Rebates
- Dedicated Account Teams
- Pre-Season Software Training
Industry Leading Innovation
Supremo Tax Management Dashboard
The Supremo Tax Management Dashboard allows our Tax Software customers complete control over, and visibility into, each sub-site within their multi-office tax preparation organization.
Supremo Tax Mobile Apps
Free access to TaxPass, a taxpayer mobile app, as well as ERO Go for managing your tax offices. These apps work directly with one another to provide you and your taxpayers with an unparalleled customer experience.