To add a new subaccount here are the few things you need to keep in mind.
1 ) You can ONLY add an existing user as a sub account so ask your sub-account holder to first create a free teliportme.com account.
2) Once the person has create an account. Use their Teliportme account to add the sub account
3) After you have added the sub-account you have to Allocate the "limits" for the account.
In this dialog - you can allocate
Choose your Subaccount from the dropdown.
Number of tours for the subaccount
Number of brands for that subaccount
Amount of storage for that subaccount
Allocate the number of custom domains that subaccount needs
Choose if this allocation is revocable or not.
After you add the allocation you will see it in the list under allocations.