Download a free Maryland LLC Operating Agreement. List LLC Members, how profits are split, and how your LLC is taxed.If you are a sole proprietor in Maryland you would file the same as an individual using Form 502. This article provides a stepbystep guide to starting an LLC in Maryland, including the cost. You can use one of our attorney-drafted templates to fill out, save, and download your operating agreement for free. Sole Proprietorships: Complete sections 12 - 13 below. 6. What do I include in my Maryland LLC Operating Agreement? You will need to fill out the form with your trade name, address, business description, and signature. With no liability protection for Maryland business expenses and debts, your personal assets could be at risk. They need to check box d in the Type of Return section to show that the form is final.