Website: Top left menu (3 lines on top left) > Service Center > Change Nominee Details.
App: Home page → Menu (bottom right) → Mutual Funds → Service Center → Change Nominee Details.
Note: If you have not invested in Stocks & ETFs, then you will be on the Mutual Funds page by default.
Enter the new/updated nominee details and submit the request. We will first update your dashboard and then also update the mutual fund folios in which you have invested (if any).