Global-e calculates the duties and taxes due on each relevant order depending on the shipping address, the product tax code, the country of origin of products, value, and more, and presents it to the customer on the checkout page, with an option to prepay to guarantee the landed cost.
For some countries (like the EU, UK, Australia, New Zealand, Norway, Switzerland) we use Hidden Forced DDP, which means the customer does not see the D&T when completing the purchase. You may absorb the cost or include D&T in product cost using pricing coefficient.