Foreign businesses need only register if they are about the threshold of S$100,000 in a following year and/or annual global turnover exceeds SGD 1 million. These businesses must register with the Inland Revenue Authority of Singapore. There is a simplified Overseas Vendor Registration scheme.
Marketplace or similar intermediaries are required to collect the GST if they control the transaction, including payment and T&C’s.
Worldwide VAT & GST rates on digital services — by country