For income tax purposes, it is very important to keep your money separate. PayPal can set you up with business and personal accounts. You should open a business bank account also. This will give you a business ATM and credit card.
Paypal will transfer your money to the right account.
when you get the business ATM, add that card to your payment choices for Amazon and Wayfair. They will then contact you, and will help with setting up a business account with them. This gives you even more discounts for business purchases. Very nice discounts. This will give you a printable order list to make taking business deductions at tax time. Good luck!