Hi there,

You might be making some mistake, otherwise all the options of the college are there at the same site of josaa counselling, and there only you will have the options to lock the college, btw the last date of josaa is not today that's why you might not be able to lock it, but technically it is the only way to lock the options.

You can check your college options at our college predictor tool

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer