Vertex does all the things you'd expect from a company in this field – providing rules and rates, address verification, reporting, exemption certificate management and filing and remittance. Vertex also has the normal offering of reselling and referring parts of its channel program. The platform is the cloud-based Vertex SMB TaxCentral which has integrations to NetSuite and Dynamics GP and an unspecific listing for Sage noted on the Vertex website.