Connect with an accountant specializing in small business because your taxes will be a completely different animal from here on out. If you need an accounting background, let a professional guide you and help you set up proper systems for maintaining income and costs.
Also, be sure to keep your business expenses organized from the beginning. This will save you tons of stress down the road, free up your time as a creative, and give you peace of mind.
Note: Laws and regulations vary significantly from state to state. Be sure you thoroughly research what applies to your specific location to avoid any problems down the road.