Go to mfcentral.com and sign up for an account if you don't already have one. You'll need to provide your PAN and mobile number.
Login using your PAN and password or through OTP.
Select the 'Service Request' option and click on 'Update Nominee Details.'
You'll see all your mutual fund investments, including all your folios linked to your PAN and mobile number. Select a specific fund and click 'Next.'
Click on the edit symbol (indicated as 1).
To add a new nominee, click 'Add Nominee' (indicated as 2).
If you don’t want to add anyone, select 'I do not wish to nominate'.
After making the changes, click 'Save.'