There are many reasons to apply (register) for a business name including being able to use the name with banks, venders and financial institutions. You’re going to need checks, credit cards and bank accounts with your name on them, as well as the ability to do business as (DBA) a company, and to get there you’ll have to have a registered business name.
Having a registered business name also allows you the ability to take legal action under the name, keep valid business records and statements, and obtain financing for your business from financial institutions.
Finally, your legal business name must be included on any government forms or applications including, but not limited to, your employer tax ID, business licenses and required permits.