Lot of my orders which went beyond 400 shipped via fedex I received a bill later which I paid directly to fedex. Fedex handled the import duties when it entered Singapore.
Example a 3d printer from Aliexpress, performance PC water cooling parts.
Amazon I always try to keep below 300 so never received any custom duty charges.
What if I buy graphic card from Amazon, the GST is already inside the cost or I have to pay the GST to the courier?