Eftpos integration is where posBoss sends the amount of the payment through to your eftpos terminal, so no double handling is needed.
Integration is included on our Control add on. To add Control to your subscription, head to the posBoss Management Site and go to Settings > posBoss Settings > Subscription > Manage your subscription.
Tick on the Control add on and press Let's Do it at the bottom of the page. You will need to enter in your credit card here to confirm the change, which is billed pro-rata on your next monthly billing date.
If you haven't already... let us know what eftpos company you are with through the support channel and we'll get it switched on for you in a jiffy!