In wbjee,will I have to revisit the reporting centre to participate in 3rd round,if I have opted for upgr.after 1st round

Sorry your question is little unclear.

But as per my perception , if you got the desired college in the first round itself you need not attend the third round if counseling.

no . you need not .If you are not getting the college of your choice then you can contact is f or direct admission in top colleges of kolkata contact us directly on 798O9O1179 via whatsapp or call  ( 10 am - 6 pm ) . We are providing direct admission in top colleges through management quota at the guaranteeed cheapest price . Candidates having backward ranks like 1.5 lakh can also be admitted in good colleges . So do not lose hope about rank  . We also provide free admission to some colleges depending on the stream as a goodwill .