When booking in shipments with ILG, any duties and taxes on a shipment are by default. paid by the receiver (your customer). However if you would like to pay for these instead then you'll want to navigate to your ILG settings within Shiptheory and click on the advanced settings

from here you will see an option to select who pays for duties and taxes between the sender and receiver.

Now whoever you have selected, the receiver or the sender, will pay for all duties and taxes concering your shipments.

If you have any queries or issues with this please get in contact with support and we would be happy to help!