I didn't get a business license last year. Can I still claim all of my supplies and stuff for a write off? Should I get a business license? I live in Arkansas. I want this to be a small business and be able to get benefits of a small business.

You should be able to deduct legitimate business expenses, but don't forget to include all your business income in your return. You should get a business license and you should be able to be a small business.