Learn how to file an amendment for a limited liability company (LLC) or corporation in Washington with our free guide and filing instructions. To change from Ccorp to Scorp status, you must file Form 2553 with the IRS.What are Shares of Stock and how are they used? â–ˇ Complete ALL sections of the Transfer of Stock Ownership Form? â–ˇ Sign and Date the form in Section D and Section G? You will need to form an official board of directors when incorporating in Washington. Here are the states explicit regulations regarding these directors. To create a Washington S corporation, you'll need to create either an LLC or a C corporation if you haven't already done so. Then, you'll file an election form. Can I change the value of the stock in the future?