You need to establish various tax accounts for your business. You can fill out the interactive.Each Contractor shall submit a completed W-9 form with its quote. To determine if you need a license, contact your local Clerk of the Circuit Court or call the State License Bureau at 410-260-6240. One way to prevent problems is to take time with the contract and always hire a contractor who is licensed with the Maryland Home Improvement Commission (MHIC). The hours to obtain a business license from the Clerk of Court is am to pm Monday through Friday. Learn about the types of business licenses. The hours to obtain a business license from the Clerk of Court is am to pm Monday through Friday. Learn about the types of business licenses. Owner-Builder B-General Building Construction Project Experience.