Enabling the Follow Me feature will give you options of how you want to set up call forwarding parameters.

In your Account under Advanced Parameters, enable Follow me in the check-box:

Choose from the action list the "Follow Me" option:

Enter the "Phone number/CLD" and needed "Follow Me Mode" (always, off, on busy, on no answer, on unavailable):

In the event that more than one number is required, add more than one by entering details and clicking on the green "+" symbol.

Specify "Order Preference" (in which order calls will be forward) and "Timeout, sec" (waiting timeout for every follow me) to structure your Call Forwarding sequence.