The data to be transmitted covers all data on invoices or equivalent documents that serve as bills for payment (or adjustments of bill for payment) for supplies and purchases made. Businesses must transmit data on standard, zero-rated, and exempt supplies and purchases reported in GST returns.   The GST InvoiceNow Requirement adoption will initially be voluntary in May 2025, followed by mandatory participation implemented progressively in phases: From 1 November 2025, for newly incorporated companies that register for GST voluntarily.  From April 1, 2026, all new voluntary GST registrants must start transmitting invoice data to the IRAS through an Accredited...