Optimize duties collection
The next step is implementing a strategy for handling costs imposed by duties and import taxes. When shipping internationally, you have two main approaches:
Delivered At Place (DAP): Your customer pays duties and taxes upon delivery. While this requires no upfront cost from you, it could lead to surprise fees for customers and potential delivery delays.
Delivered Duty Paid (DDP): Duties and taxes are calculated and collected at checkout. This creates a transparent experience for your customers with no surprise fees at delivery. With Shopify, you can either absorb these costs yourself or collect them from customers at checkout.
Reference: https://www.shopify.com/blog/international-import-shipping

Managing duties and taxes in international markets
Shopify merchants can use the duties calculator in the admin to estimate duties and import taxes. You can build duties into your prices to cover expected costs, or choose to transparently display duties to customers at checkout. By communicating that no additional fees will apply at delivery, your customers will feel more confident in completing their purchase.
Here’s how:
Go to Settings > Taxes and duties in your admin to turn on duties and import tax collection at checkout.
Add a country of origin to your products so the correct import tax and duty rates are applied at checkout.
Add HS codes to your products to identify what the product is and help avoid border delays.
You can bulk-add HS codes and country of origin via CSV, or add them manually on the product’s page.
Reference: https://www.shopify.com/blog/international-import-shipping