Whether ecommerce operator must register in every State/UT where suppliers are listed on their ecommerce platform to comply with the law ?

According to the existing law, TCS registration would be required in every State / UT. The obligation to collect TCS for any intra-State or cross-State supply would also be present. To facilitate registration in every State / UT, an e-commerce operator can declare its Head Office as the place of business in order to obtain registration in that State / UT if it does not have physical location. Each State/UT has designated one administrative jurisdiction in which all e-commerce companies with business in that State/UT (but not having physical presence), shall register. Each State/UT has also notified the appropriate officer for the purposes of registering ECOs