Dear aspirant,

I'm glad that you wish to take admission in St. Xavier's College Kolkata. I see the problem that you are going through in the process of admission. Fortunately, yes, if you haven't gotten an official marksheet from your school then you may submit one from Digilocker or CBSE Website. Just make sure to attach a note that your official marksheet has not yet been distributed by your institution and you'll be fine.

Hope this helps!

Good Luck!