Depending on which state you are licensed in there are many different ways. The first step though is to find a real estate company to place your license with. Talk with the broker/manager of the company and they will then let you know the process. States like Florida are simply done online. A broker will login to their online system, input your license number and simply click add to add you to their company. You would then be active instantaneously. Whereas states like North Carolina you would have to fill out a change application which is several pages. The broker would then take this application and submit it to North Carolina via fax or email. Once the real estate commission receives, they can then take several days before you are active under the brokerage. Talk with your broker of choice and they can let you know the exact steps. Good luck!