This tutorial explains how to generate a new SER certificate for a staged project. Further information on this process and the information required to generate a certificate can be found in Guidance Note 4 - Use of Certificates of Design.
Further guidance on certifying staged projects is available in the How to certify staged projects blog.
If you are generating the first certificate for a staged project, you will only add the details of the stages you are certifying now to the Stage Information page - often this is only Stage 1.
Details of later stages not yet being certified should be added to the Items to be certified in a later stage page.