To set up a trade account for interior design, you will need to start by researching and selecting the suppliers or manufacturers you want to work with. Many companies offer trade accounts specifically for interior designers, which provide access to trade discounts and other benefits. Visit the supplier's website or contact their customer service department to inquire about setting up a trade account. They may require certain documentation such as your business license, resale certificate, or professional accreditation. Fill out any necessary application forms and provide the requested information to establish your trade account.