Ryan P. Giolitto, a tax manager at CDH, presents on state income tax principles, apportionment factors, and nexus, detailing how federal taxable income is adjusted for state-specific calculations. He explains the history and types of nexus, emphasizing the growing importance of economic nexus standards, compliance suggestions, and planning strategies to minimize state tax exposure. The presentation highlights the significance of understanding state laws, filing requirements, and voluntary disclosure opportunities to manage tax liabilities effectively.