Hii Ananya!
You didn't mention the state or the name of the Colleges you are interested in, to take admissions in BA courses. But, let me tell you that the application forms for admissions in colleges usually start in the months of April to June. Sometimes some colleges even release the forms early. So you will have to keep an eye on the official website of the respective colleges of your interest in order to know about the application process. Hope you understand.
Good luck!