MKS.Tax is a leader in cost effective end-to-end tax technology implementations. MKS Tax value proposition stems from agility, experience and fluency in both tax and IT. Our alliance with Vertex helps global businesses automate sales tax, consumer’s use tax, lease tax, VAT and communications tax calculation, reporting and compliance in diverse legislative and technical environments.


Years of experience integrating and implementing transactional tax automation software for corporations ranging in size, industry and technical environments allow us to quickly understand, and if needed refine, your business and technical requirements as well as to provide focused knowledge transfer to the appropriate IT and Tax personnel.


MKS.Tax provides services in end-to-end compliance process review, business & technical requirements review, project management, solution design & development, taxability setup, solution testing, user training, go-live support, tax/ERP system reconciliation, off hours and remote access support, data intelligence & transformation and Vertex system upgrades.

Projects Governance

Using industry standars RASCI responsibility assignment model, MKS resources can readily plug into an existing project plan you may have. Conversely, our project management system can readily incorporate any resource provided by our customer.




Identifying functional and technical requirements, usually by way of discovery workshops, is key to a successful engagement. We take care to account for all aspects of a tax automation solution.


Functional topics include: business requirements review, gap analysis, quality of address records with regard to proper identification of pertinent taxing jurisdictions, product and services categorization pertinent to taxability mapping, customer exemption certificates management pertinent to driving and defending exempt transactions, merchandise returns and credit memos processing, reporting and reconciliation requirements, compliance and returns filing processes, business flow review as it pertains to sourcing transactions from external systems, master data review as it pertains to sourcing elements of a transaction used in taxability decision making, training plan, test plan, open orders/invoices transition plan, go-live plan, roll-back plan, support plan, upgrades plan.


Technical topics include: security of data flows across the Internet, performance requirements, data logging requirements, application servers requirements, database servers requirements, high availability requirements, disaster recovery requirements, integrations requirements, permission and access requirements.




Our comprehensive blueprinting phase drives efficient realization of given project. The task may include installation of the Vertex product, customization and installation of integrations appropriate for given ERP system and tax engine combination, configuring secure communication, providing training to technical and functional users of the integrated system, configuring Taxability Manager and Tax Assist, assistance with acceptance testing and assistance with performance testing.




At customer’s convenience, including weekends, US holy days and off hours, MKS.Tax provides go-live and post-go-live support, as well as assistance with month-end processing using the new system.




For businesses using obsolete versions of Vertex tax engines, MKS.Tax provides a direct 2-week upgrade path to Vertex Cloud Indirect Tax and Vertex Indirect Tax O Series. Moreover, MKS.Tax upgrades to the latest versions of Vertex O Series or Vertex Cloud do not require ERP upgrades or customizations.


MKS.Tax supports full spectrum of VAT compliance concepts, including reporting, partial input VAT recoverability, cash-based VAT accounting, currency conversion, consolidated invoicing, VAT withholding and electronic invoice records submission.

MKS.Tax is a leader in cost effective end-to-end tax technology implementations. We maintain an alliance with MKS.Tax, whose value proposition stems from agility, experience, and fluency in both tax and IT.

Vertex, Inc.