The CCH State Tax NexusExpert incorporates guidance tools that are designed to provide legislative news, state filings and CCH's library of tax information. Content features include Nexus News, which provides access to tax nexus developments in each state and links to State Tax Day summaries.

The system also provides Tax Tracker News, a customized daily news service that can be delivered via email or to a user's personalized news page. The tracker also alerts users to tax nexus developments. Qualification for Doing Business summarizes state requirements for a corporation to qualify to do business in states other than its state of incorporation and provides business law summaries for all 50 states, the District of Columbia and Puerto Rico,

What Constitutes Doing Business (CT Corporation) clarifies terms of doing business by a corporation in states foreign to the state of its incorporation. It includes statutory definitions of "doing business" for each state; and Sales and Use Tax Nexus which examines specific actions and legal issues surrounding the determination of sales and use tax nexus.

Price: Starts at $779 CCH:  CCHGroup.com, or (888) 224-7377.