ONESOURCE Certificate Manager vs Sigma Tax Pro

ONESOURCE Certificate Manager

7.3 #33 in Tax Compliance Software

About ONESOURCE Certificate Manager

Sigma Tax Pro

5.8 #24 in Small Business Tax Software

About Sigma Tax Pro
ONESOURCE Certificate ManagerSigma Tax Pro
Free planNo
Platformsapi, self-hosted, Web, WindowsWeb
Electronic filingYes
Consolidated returnsYes
Tax provision supportYes
Accounting integrationsYes
Deploymentcloud
Tax return filingYes
Free planNoNo
Jurisdictions covered62 jurisdictions
Supported tax typessales tax exemption certificates
Return filingYes
Filing support levelnone
API accessYes
Real-time calculationYes
Tax typesmultiple
Commerce connectorsYes
Exemption certificatesYes
Forms coveredboth
Federal e-fileYesYes
State e-fileYesYes
Correction filingYes
Import methodsapi
Scenario modelingYes
Data importYes
Filer typesboth
State returnsYes
Amended returnsYes
Self-employed supportYes
Electronic filing includedYes
Accounting standardsboth
Provision scopecurrent and deferred
Rate reconciliationYes
Provision-to-returnYes
Excel workflowYes
Case law databaseYes
Current law updatesYes
AI research toolsYes
Document alertsYes
Platformweb
Sanctions screeningYes
Tariff classificationYes
Landed-cost calculationYes
Trade document generationYes
Customs filingYes
Paid from495 one-time
Business entity supportForms 1120 and 1065; individual 1040 returns

Listed together in Best Small Business Tax Software