The Inland Revenue Authority of Singapore (IRAS) has updated its Guide to completing the GST registration form. The main update concerns the InvoiceNow implementation date for all new GST-registrants, including compulsory registrants. InvoiceNow is an e-invoicing network based on the Peppol framework that is used for the transmission of invoice data to the IRAS. From 1 April 2028, all new regi…