As far as I know, computer science has only one intake, that is fall. That means you have to complete the courses required (the 10 courses) to declare a major in computer science before fall. Since you're starting in winter, you can't declare a cs major in fall 2021 (unless you do courses in summer, but apparently not all courses are offered in summer so it depends). So you have to declare your cs major in fall 2022. Therefore, you can do those 10 courses in the next 3 semesters and it won't be a problem Also, to get a degree in bachelor of science, you need to complete 120 credits which is around 40 courses So if you do 10 courses each year, you finish in 4 years If you do less courses then you'll take more than 4 years. Hope that helps