Hello Umang, Yes, you can apply for an IPO through TradeSmart using any supported UPI app. All you need to do is to login box.tradesmartonline.in. Please refer to the given link to know how to apply for IPO through TradeSmart: https://help.tradesmartonline.in/how-to-apply-for-ipo/
Secondly, please write us at support@vnsfin.com for issuance of Client Master Report (CMR) containing your client details so that we can check and assist you.