If so, how do I get one and how much does it cost?
Are there exceptions to this?
Is it the same in other states? If I got one, would it be legal in all states?
I am trying to open a small business.
Answer on Do you need a license to sell shirts in Louisiana?
All businesses should have a business license, but if operating as a single person with no employees in the beginning can operate without one while earning a small income. All states are the same way. A business license is recognized by all states, but if your business location changes you must register the business in the new state and un-register in the previous state.