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Avalara TaxRates API is an easy way for developers to use sales tax rates in their project.

TaxJar simplifies sales tax filing for eCommerce sellers.

SaaS solution for the new 2015 EU VAT rules

Vertex Cloud offers sales and use tax automation solutions.

Taxify is a sales tax platform for eCommerce.

Octobat provides automated tax-compliance and accounting for digital businesses.

TaxCloud makes it easy for wholesalers and retailers to comply with sales tax laws.

Centralize and streamline indirect tax management across the enterprise.

Sovos Compliance provides solutions to help businesses meet the demands of their tax, compliance and reporting obligations.

Symmetry offers software solutions for payroll witholding tax.

DATEV data center offers services, such as data analysis, archiving, backup, printing,and sending reports.

CCH Sales Tax Office is an online tax calculation tool designed for larger corporations that manage the sales queries.

CSC Corptax offers tax planning, provision, and compliance solutions.