You can transfer funds between accounts in the Account section.
To transfer into your sub-account:
Click the Move money button and choose the Transfer between accounts option.
In the popup window, enter the amount you want to deposit.
In the dropdown list, select the account you want to transfer money from.
Then select the sub-account you want to deposit into.
Click the Review button, and check if all details are correct. Now you can click the Transfer button in the lower right corner of the screen. The transfer usually takes a few seconds.
