Specifications include, but are not limited to: This Bid Solicitation {RFP} is issued by the Procurement Bureau, Division of Purchase and Property (Division), Department of the Treasury on behalf of the Division of Taxation (Taxation), Division of Revenue and Enterprise Services (DORES), and Office of Information Technology (OIT). The purpose of this Bid Solicitation {RFP} is to solicit Quotes {Proposals} from qualified Bidders to install a Commercial Off-The-Shelf (COTS) Integrated Tax System (ITS) to replace outdated information technology tax systems and infrastructure. The intent of a COTS solution is that it is flexible and allows for the extension of the COTS software's capabilities as follows: Configuration of base COTS software; Integration with other COTS products via modular design; Integration with custom components via application software extensions; and Modification of COTS source code (by the Vendor {Contractor}).