Sign up and manage your deferred compensation retirement account. Contribution Form and submit it online, or call the Bureau of Deferred Compensation at.Line B – Total Business Interest Expense – Enter your total business interest expense calculated on Federal Form 8990, Part I, line 5. Learn about common tax and Form 990 reporting issues associated with nonqualified deferred compensation arrangements. Guide to Permits, Licensing, and Regulations. Use these tools and resources to set up a California small business that is ready to legally operate.