Any type of annexure or form has to be submitted at the time of your first physical/online reporting for example in case you are allotted a seat in any of rounds of josaa then you have to submit all the forms required for reporting or if you are allotted a seat for the first time in csab then also you are required to submit all the forms but if you were allotted a seat in josaa and had successfully reported within time and then if you participate in csab and are allotted a seat then you don't need to submit all forms once again.