Yes, the emergency contact list you chose the first time can be changed as many times as you wish.
To change or remove of one or more emergency contacts, follow these instructions:
open the Tata app, press the three dots and choose emergency contacts
Next to each contact you will find two choices: "edit" if you want to replace your contact with a different one or "remove" if you want to delete that contact from your list
We remind you that at least two contacts must remain in your list. Make sure that the area code is at the start of the telephone number, or alternatively click on "add area code".