When do exams take place?
Most home-educating parents enter exams for May/June, these are the ‘summer sittings’ but do be aware that they are earlier than summer and this may well have an effect on your revision plans because you don’t have all the time you may imagine. CAIE exams always start slightly earlier than other boards (last week in April). CAIE November sitting actually starts during the first week of October (so you have one whole month less than you may imagine).
Please note that Edexcel IGCSE are no longer offering January exams but they are now offering November exams in limited subjects. Do check which subjects are available as this may change.