Document format and locale facts for Taiwan

Why these defaults?

The country code comes from ISO 3166. Unicode CLDR supplies presentation-oriented locale, currency, paper, date, language, calendar, numbering, and direction metadata. Defaults reduce setup time; they do not decide what a valid document must contain.

Recorded official or regional-official language tags: zh-Hant, nan-Hant, hak-Hant.

Selected national claims reviewed

Document vocabulary and checks

Core Taiwanese external-accounting-voucher particulars, five-year voucher and ten-year book retention, and the electronic uniform-invoice identity, assigned-number, platform and API boundary are reviewed. Business eligibility, invoice-type selection, EDI integration, platform upload, prize, donation, allowance and error/cancellation workflows remain separate checks.

Evidence snapshot: 4 official sources · last reviewed 2026-07-19. This is scoped guidance, not a jurisdiction-wide compliance certification.

Tax labels: 營業稅 (Business Tax). Business identifier labels: 統一編號 (Uniform Business Number).

• Required when applicable: Taiwan Ministry of Finance guidance says external accounting vouchers generally state both parties' names, addresses and uniform business numbers; transaction date; item name; quantity; unit price; amount; sales amount and business-tax amount, with the stated recipient exceptions and electronic-invoice treatment.Evidence TW_MOF_ACCOUNTING_VOUCHER_FIELDS · reviewed 2026-07-19 · review by 2027-01-19 · automation advisory only
• Required when applicable: Profit-seeking-enterprise accounting books are generally retained for at least ten years after annual closing, while accounting vouchers, including copies or stubs provided to others, are generally retained for at least five years, subject to permanent-record and unsettled-matter exceptions.Evidence TW_MOF_RECORD_RETENTION · reviewed 2026-07-19 · review by 2027-01-19 · automation advisory only
• Guidance: The Ministry of Finance defines electronic uniform invoices as invoices issued, transmitted or obtained electronically and requires the issuing system to support issue, receipt, cancellation and certificate processing. Businesses use identity authentication and the MOF E-Invoice Platform or an approved value-adding centre. This preview does not authenticate, issue an assigned alphanumeric invoice number, upload data or use the E-Invoice Platform API.Evidence TW_MOF_EINVOICE_DIRECTIONS, TW_MOF_EINVOICE_API · reviewed 2026-07-18 · review by 2027-01-18 · automation advisory only

Identifier format guidance: See the relevant authority.