Yes, you can. To do this, you can:
1. Register both the primary and joint account holders on Goalwise under 2 different logins.
2. Email email@example.com from the primary account holder's registered email ID and request joint account holding.
We will do the needful in 2 business days and get back to you once it's done. Please note that a joint holding account can only be set up before you have started investing.