Categorizing expenses by your business entity. Looking at the forms below, you will see what categories IRS is looking for. That is IRS. But as a business owner, you have to (need to) track more details to review and analyze your reports on a daily, weekly, monthly, quarterly and yearly basis. Remember at the end of the day it is all about money. Money not in your bank account but equity in your business.
Start with basic Profit & Loss and Balance Sheet, you can find the simple way to get you a jump start. Overwhelmed, I would be too especially when it comes to marketing and other aspects in running a business. Hire someone, save time and money in the process.