Cincinnati--HSR Business-to-Business said Tuesday that Nationtax Online, Birmingham, Ala., has signed with the integrated marketing communications agency to build demand for Nationtax's services. The deal comes on the heels of the formation of HSR B2B, Cincinnati, which is built on the foundation of the old-line business-to-business agency Hensley Segal Rentschler. HSR B2B will soon launch a print and Web advertising campaign for Nationtax, which sells Web-based tax filing services to corporations. Campaign budget, timing and media strategy were undisclosed. The Nationtax win builds on HSR B2B's formidable client roster, which also includes GE Plastics and Xerox.