I need the steps for transfering common stock of an s cl corp from one person to another?

You should check the laws of your state to see if you need to file anything official with your state's Department of Revenue, Secretary of State, or Attorney General regarding the cancelling of the old stock certificate and the issuance of the new one. And, depending on how the stock is transferred, there might be an entry to the company. If the Corporation buys back the original 25% ownership from one of the 4 then there would be an entry for that, and also an entry for the sale to the new owner. But if the owners sells his 25% to the other person without involving the company then there is no entry needed by the Corporation, as the sale would have happened outside of the company. If you like, feel free to contact me if you have any further questions.