Every e-Invoice submitted to LHDN's MyInvois system must include the TIN of both the issuing business and the buyer. Without a valid TIN, an e-Invoice cannot be validated.
Your TIN is issued by LHDN and can typically be found on prior tax correspondence, or retrieved through LHDN's official channels (MyTax portal). Software like TxBilling stores your TIN once and applies it automatically to every e-Invoice you issue.
No. TIN identifies a taxpayer for LHDN purposes; BRN (Business Registration Number) identifies a business's SSM registration. Both may be required depending on the transaction.
LHDN provides guidance for handling buyers without a TIN (e.g. general public consumers), often via a standardized generic TIN value for eligible transactions.