Closure of Proprietor Business

Dear Sir/Madam I opened a startup company in 2015 as sole proprietor in Kolkata and for that I applied and got trade license/Shop & enlistment certificate for 2015-16 where the address given is home address, In the year 2016-17 for renewal they asked for professional tax certificate,without that they are not willing to issue trade license for that year. I got P.Tax certificate but in the mean time on November 2016 business was closed and i didn't get trade license. In the month of June i received an email for submitting P.tax and on June 2017 P.tax registration was duly closed by me. I want to know that for closure of proprietor business is it sufficient to close only P.Tax registration as the municipal corporation will not issue fresh trade license/Shop & enlistment certificate without P.Tax. The confusion is that some people are saying P.Tax closure is sufficient and some are saying Trade License need to get closed separately. What will happen if I do not close trade license/Shop & enlistment certificate. Kindly provide the necessary information as soon as possible. Waiting for your reply. Best Regards Raj Kamal Roy