Call (215) 545-4830 - Danziger Shapiro, P.C. is dedicated to serving our clients with a range of legal services including Business and Corporate cases. To bid on a Professional Services contract, you must register with eContract Philly.To register, you'll need: Your tax ID number. Legal advise and agreements for purchasing a business or selling a business. Get our free, updated 2022 checklist for business buyers. You can submit a request for an agreement online through the Philadelphia Tax Center. Here's how: Log into your Philadelphia Tax Center profile. Our legal team can help you document all of a company's assets, draft up the proper terms for their sale, and fill out the extra forms you need to submit. Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer. The Agreement of Sale for Commercial Real Estate should be used to outline the terms of the agreement when selling or purchasing a commercial property.