Adding shareholders to a California corporation involves selling corporate stock. When someone receives shares of stock, they officially become a shareholder.What are Shares of Stock and how are they used? A new license is required whenever the business entity changes (such as sole owner to corporation, sole owner to partnership, partnership to corporation, etc.) All changes in ownership require that property owners notify their Assessor as soon as possible to avoid potential interest charges or other penalties. To edit or amend a share class, select "Share Classes" from the "Cap Table" subsection in the left navigation. When issuing shares in an S corporation, there cannot be more than one class of stock for S corporations. Click the button towards the top that says File Amendment. Then another box will pop up. If you want modify your articles of incorporation, you must file an amendment.