interstate sale (IGST).

for gst no ur pan no is base so u cant 

apply for same pan no a another gst no

and if u register in gst u need to fill return 

is respect of nil business also

i dont know this ficility is avaible in site or not

but before cancellation ur accounts must be 

check by concern officer and if any thing is 

there like not filling the return he may ask u

about it after all clarrifaction it will 

cancelled ur gst no

wait but non filling of gst returns is must