You'll need to use the serial numbers off each of the components to be covered for the LSA. When registering, the site will ask you the R number off the box, as well as each components serial number, as well as requiring you to upload a home depot receipt as a pdf or photo. This all must be done within 90 days of purchase. I usually check back after about 2 weeks to make sure my LSA is approved. I also make a back photo copy of the home depot receipt as the thermal paper its printed on fades out over time.