Projects automatically show up in your Project Dashboard once you are invited. If you cannot access a project via the email invite link you received, and you don't see it in your Project Dashboard, the invite was either sent to the wrong email address, or you are logged into the wrong VeryBusy account.
Make sure the VeryBusy invite was sent to the correct email address
If you created a new VeryBusy account from the email project invite, be sure you created it with the email address to which the invite was sent
If you have multiple VeryBusy accounts, be sure that you are logged into the account that uses the email to which the project invite was sent