Korea e-Tax Invoice
NTS electronic tax invoicing (전자세금계산서) for Odoo — TaxInvoice XML, PKI signature prep & ASP clearance
Connect Odoo to the Republic of Korea National Tax Service (NTS) e-Tax invoice system — the oldest mandatory clearance model in the world. Customer invoices and credit notes become NTS TaxInvoice XML, are prepared for your accredited-certificate signature, and are cleared through your ASP — which returns the official approval number (승인번호).
NTS TaxInvoice XML
The full NTS TaxInvoice tree — ExchangedDocument, SellerParty / BuyerParty with BRN, representative and business type/class, TaxTotal and per-line trade items — with the correct type codes (0101 tax invoice, 0102 amended, 0201 계산서) and taxation kinds.
PKI signature preparation
The document is canonicalised (W3C C14N), an SHA-256 DigestValue is computed and a fully-formed ds:SignedInfo (RSA-SHA256) is produced — so your bring-your-own accredited certificate signs exactly the bytes the NTS expects.
Real BRN validation
The 10-digit Business Registration Number (사업자등록번호) is validated with the official NTS check-digit algorithm (weights 1·3·7·1·3·7·1·3·5 plus the ninth-digit carry) on company and partner, with taxpayer-class detection.
NTS business-rule validation
A Korea rule set layered on the engine's EN 16931-style core checks supplier/buyer BRNs, line taxation kinds (taxable 10% / zero-rated 영세율 / exempt 면세), KRW currency and the representative before anything is submitted.
Clearance via your ASP
Submit, status polling and cancel/reissue over a configurable accredited ASP REST API — editable base URL and endpoint paths, API-key or bearer auth, automatic retry with exponential backoff and full transport logging. The NTS is reached by the ASP, not by this module.
Bring-your-own-key
Your ASP API key and certificate material live on your own database. They are transmitted only to the accredited ASP endpoint you configure — nowhere else — and certificate signing happens in your own certificate store.
Guided onboarding
A wizard captures your BRN, representative, business type/class and ASP credentials, validates the BRN with the real NTS checksum and leaves the company ready to issue e-Tax invoices. An optional cron drains posted documents to the ASP in batches — the NTS requires reporting by the day after issuance. A verification QR (offline JSON + Hometax link) is rendered for the printed invoice.
Compatible with Odoo 18 and Odoo 19.
Disclosure
This module transmits invoice data only to the accredited ASP endpoint you configure, which relays it to the National Tax Service. Your ASP API key and certificate material are bring-your-own-key, stored solely on your own database and never sent anywhere else.
Screenshots
E Tax Customer Invoice Inv 2
E Tax Document Einv 2026 000
Update date: 2026-07-02
| Availability |
Odoo Online
Odoo.sh
On Premise
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| Odoo Apps Dependencies |
•
Discuss (mail)
• Invoicing (account) |
| Community Apps Dependencies | Show |
| Lines of code | 3013 |
| Technical Name |
l10n_kr_etax_invoice |
| License | OPL-1 |
| Website | https://pokutsoft.com/ |
Odoo Proprietary License v1.0 This software and associated files (the "Software") may only be used (executed, modified, executed after modifications) if you have purchased a valid license from the authors, typically via Odoo Apps, or if you have received a written agreement from the authors of the Software (see the COPYRIGHT file). You may develop Odoo modules that use the Software as a library (typically by depending on it, importing it and using its resources), but without copying any source code or material from the Software. You may distribute those modules under the license of your choice, provided that this license is compatible with the terms of the Odoo Proprietary License (For example: LGPL, MIT, or proprietary licenses similar to this one). It is forbidden to publish, distribute, sublicense, or sell copies of the Software or modified copies of the Software. The above copyright notice and this permission notice must be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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