Sigma Tax Pro

5.9easy start · #23of 29
in Small Business Tax Software

Free to practise onno
Well documentedyes
Runs where you workno

Runs on Web.

Sigma Tax Pro is ranked #23 of 29 in small business tax software on The Geeks Club. It runs on Web. There is no free plan.

Sigma Tax Pro plans and pricing

All plans

Sigma 1040-SR $495 once Desktop or web; desktop required for Forms 1120 or 1065 sigmataxpro.com · 8 Oct 2026

Sigma 1040-TW $495 once Desktop or web; desktop required for Forms 1120 or 1065 sigmataxpro.com · 8 Oct 2026

Sigma 1040-DR $895 once sigmataxpro.com · 8 Oct 2026

Compared on small business tax software

Free plan: No
Paid from: 495 one-time
Business entity support: Forms 1120 and 1065; individual 1040 returns
Federal e-file: Yes
State e-file: Yes

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The record

Purpose: Sigma Tax Pro offers professional tax preparation software for tax preparers, accountants, and CPAs.
Tax forms: The company says its software covers Forms 1040, 1120, and 1065.
Software versions: The 1040-TW and 1040-SR are offered in desktop and web-based versions.
1040-TW tools: 1040-TW includes hypothetical tax scenarios, diagnostics, instant calculations, and conversion software for most tax packages.
1040-SR tools: 1040-SR includes return status and acknowledgment views, error solving, form-based input, automatic updates, and federal and state forms.
Mobile app: The 1040-SR mobile app lets taxpayers start or update returns, upload documents, check return status, send messages, and sign remotely.
Integrations: Sigma Tax Pro says its products are powered by software developers including Drake and TaxWise, and it offers bank products through partners.
Bank products: Available refund options listed include direct deposit, in-office check printing, and prepaid VISA/MasterCard options.
Security: The 1040-TW web version says it uses an IRS-compliant system, and the 1040-SR web version lists secure SSL login and permission-based administration.
Mobile security: The mobile app page says it uses multi-factor authentication for document uploads and communications.
Support: Sigma says each software client has a dedicated account manager for tax preparation and software support throughout tax season.
Trial/demo: The company provides desktop and web demos for its 1040-SR, 1040-TW, and 1040-DR products.
Notable limit: The 1040-TW page says business returns such as Forms 1120 or 1065 require the desktop version.
Audience: The 1040-SR is described as built for high-volume tax preparation businesses, including new EROs and growing tax offices.

Where it ranks on The Geeks Club

Best Small Business Tax Software in 2026#23 of 29

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Sources

sigmataxpro.com/about-us/· checked 8 Oct 2026
sigmataxpro.com· checked 8 Oct 2026
sigmataxpro.com/services/sigma-1040-tw/· checked 8 Oct 2026
sigmataxpro.com/services/sigma-1040-sr/· checked 8 Oct 2026
sigmataxpro.com/mobile-apps/· checked 8 Oct 2026
sigmataxpro.com/download-demos/· checked 8 Oct 2026