By signing in or creating an account, some fields will auto-populate with your information. Join the Clark Business Community!Our suppliers are essential to our business. The Business and Financial Services site encompasses several functions of Clark, ranging from student accounts and payroll to traveling and accounting. Business License Application Checklist - Use this checklist to serve as your guide to complete all the steps to a general license. How to fill out the Clark County Business License Application? 1. Gather all required business and personal information. 2. Access bids and request for proposals for consultants, service providers, contractors, vendors, and suppliers. Instructions for completing the paper listing form are on the form itself.