Go to SIP, STP & SWP >> click on fund name >> modify >> edit >> OTP authentication
Note: SIP orders are queued with Exchange/Banks up to 5 business days in advance. Hence an SIP can be edited only up-to 5 business days before the next SIP execution date.
If the SIP edit functionality is not available for a particular fund due to scheme restriction then you can follow the below steps:
Stop the existing SIP.
Start a new SIP with the new date or amount in the same folio.