LHDN MyInvois Phase 4 — what Malaysian SMEs need by 1 Jan 2027

LHDN's Phase 4 e-Invoice mandate becomes hard-enforced on 1 January 2027. SMEs need to register a TIN, choose an ASP (we are one), validate their invoice format against the SDK schema, submit through sandbox, then production. UIN + QR rendering, 7-year archive and audit trail are mandatory. ONSET Module E1 handles all of this.