there are 2 objects contacts & accounts under that mailing address(contacts) & billing address(accounts) fields are there. they are in master detail relationship.Whenever i am filling mailing address it is updating on the billing address field which i don't want.so is it possible to remove this auto updating ?
This is not standard Salesforce behaviour - it can be created by a number of options -
- Workflow rule
- Process Builder
- Apex code (trigger)
look to see if any of those exist in your Salesforce Org that could be causing this, they can then be disabled.