During your onboarding process to accept international payments, you'll find an options to choose a transaction purpose code. We are not in the position to advise you on the right purpose code for your business, please choose the code that matches with the goods / services you're selling: https://stripe.com/docs/india-accept-international-payments#TransactionPurposeCode
Users whom already opt-in for International Payments can update their transaction purpose code at any time through the dashboard:
Click the settings icon on the top right corner of your dashboard
Choose 'International' under Business Settings, and click export related info
Update your transactions purpose code
Click continue and submit
* Users with legal entity = Individual won't be able to see this option in their account as accepting international payments is unsupportable for individual user.