CCH Sales Tax Office - CCH Sales Tax Office is an online tax calculation tool designed for larger corporations that manage the sales queries.
EXEMPTAX - Manage your resale and sales tax exemption certificates from collection to audit in minutes. Try it Free, no credit card required!
Vertex O Series - Centralize and streamline indirect tax management across the enterprise.
Sales Tax DataLINK - Sales Tax DataLINK offers sales calculation and tax reporting solutions.
Taxamo - SaaS solution for the new 2015 EU VAT rules
TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.