The State of Maryland is EXEMPT from Maryland Tax. Tax Exempt Number is 30002563 which is located on each card.Enter the total amount of all your taxable and non-taxable sales and rentals of tangible personal property, and of your taxable services. The PCPA must complete, sign and date a State of Maryland Corporate Purchasing. Card Cardholder Agreement Form (Exhibit A) or Travel Account Holder Agreement. What eCommerce sellers need to know about how to use a Maryland resale certificate, or how to accept a Maryland resale certificate from a buyer. Our free online guide for business owners covers Maryland sales tax registration, collecting, filing, due dates, nexus obligations, and more. What is sales and use tax? Sales tax is a state tax on the purchase of most tangible personal property and on some services in Maryland. We'll discuss seller financing for business and how it works, as well as highlight the pros and cons for both buyers and sellers.