According to income tax rules, if you own more than one residential property, only one of those can be considered to be self-occupied. The others should either be let out or, even if they are not actually rented out, they will be deemed to be properties that have been let out.
As you are free to specify any one of the properties as self-occupied, before making this choice calculate the annual value of each property and then choose the one that has the highest annual value as self occupied. You have the freedom to choose any property as deemed let out or self occupied. This can also be changed year on year. For year ended MArch 2020 it will be 2 months deemed let out. For next year it will be full year.