Thai Localization - Account Tax Invoice

l10n_th_tax_invoice folder_open OCA/l10n-thailand open_in_new

Localization / Accounting License: AGPL-3

This module address the undue tax requirement for Thailand

In Odoo, cash basis feature is being used to cover case of undue tax (due on payment). This can answer the issue about undue tax in Thailand partially. For customer invoice/payment, Odoo's cash basis alone is enough.

But for supplier invoice/payment and expense, where tax invoice number and tax date is given from vendor. This module will provide ways for user to do so on vendor bill (for normal tax) and in supplier payment (for undue tax which is due on payment).

auto_awesome What this module does

AI-generated from the code · Odoo 14.0

Manage Thai tax invoice numbers and dates on vendor bills, customer invoices and payments. A new Tax Invoices list keeps the tax invoice number, date and reporting period for each tax line.

This module adds Thai tax invoice information to accounting documents. On each tax line of a journal entry, the system creates a Tax Invoice record that stores the tax invoice number, tax invoice date, tax base and tax amount.

On customer invoices and refunds, the tax invoice number is filled automatically when the document is posted: it uses the sequence configured on the tax, or the document number if no sequence is set.
On vendor bills and other purchase entries, you must enter the vendor's tax invoice number and date before posting; otherwise Odoo blocks the posting with a message asking you to fill them in.
On payments, a Tax Invoice tab appears when tax is due on payment. You can enter the tax invoice number and date there, then use the Clear Tax button to post the related tax journal entries.
A Report Late field (0 to 6 months) computes a report date from the tax invoice date, useful for Thai tax reporting deadlines.
A Tax Invoices menu under Accounting > Miscellaneous lets you search and group all tax invoice records by date or partner.
The last tax invoice line of a document cannot be deleted, and the tax amount entered must match the tax line amount.

The module touches account.tax, account.move, account.move.line, account.payment and account.partial.reconcile.

Depends on

account

Required by other modules

l10n_th_expense_tax_invoice l10n_th_tax_report

Menus it adds

menu_action_tax_invoice

Models and fields (6)

account.tax · extends an existing modeltaxinv_sequence_id (Tax Invoice Sequence), sequence_number_next (Next Number)
account.move · extends an existing modeltax_invoice_ids
account.payment · extends an existing modelto_clear_tax, tax_invoice_ids, tax_invoice_move_id (Tax Invoice's Journal Entry)
account.move.line · extends an existing modeltax_invoice_ids, manual_tax_invoice
account.move.tax.invoice · new modelbalance (Tax Amount), move_id, account_id, company_id, move_state, partner_id (Partner), payment_id, report_date (Report Date), reversed_id, tax_line_id, move_line_id, reversing_id, to_clear_tax, report_late_mo (Report Late), tax_base_amount (Tax Base), tax_invoice_date (Tax Invoice Date), tax_invoice_number (Tax Invoice Number), company_currency_id
account.partial.reconcile · extends an existing model

Text generated by AI (DeepSeek) from reading the Odoo 14.0 code on GitHub; it may contain mistakes, so check the code before deciding. View the code on GitHub

Availability by version

Reviewed: 2026-11-03

Confirmed (verified in repository and branch) Estimated (unverified) No information

Confirmation status: 2 confirmed, 7 with no information of 9 versions.

Sources · Odoo 14.0

Confirmed on 2026-11-03 in branch 14.0 of OCA/l10n-thailand.

terminal Installation and usage

OCA documentation · Odoo 14.0

Configuration

Source · Odoo 14.0

For Sales Taxes (tax scope = Sales), there is option to run Tax Invoice number by sequence model. If set properly, Tax Invoice Number will be using this sequence instead of customer invoice number / payment number

Goto Accounting > Configuration > Invoicing > Taxes
For sales tax, choose 'Tax Invoice Sequence' (or create new one)
Make sure you also set the same sequence for the same tax on payment too. I.e., Output VAT7% and Undue Output VAT7% must select the same sequence, both both of them will result in same Tax Report

Note: this option is not avaiable for purchase tax, because the Tax Invoice Number is from vendor, and are filled manually.

Usage

Source · Odoo 14.0

With this, 2 new tax related fields will be introduced in account.move.tax.invoice

tax_invoice_number : Tax Invoice Number
tax_invoice_date : Tax Invoice Date

In customer invoice, both field will be defaulted by Odoo's document number and date. But in supplier invoice, both field must be filled by user with tax invoice number and date from vendor.

Note: The new table account.move.tax.invoice is the main source of Thai VAT Report

Preparing Undue Tax

Use Developer Mode
In Chart of Account, add new account for Undue Tax, if not already exists.
As admin, add access rights Show Full Accounting Features
Go to Invoicing > Configuration > Settings and select Cash Basis, this will open cash basis options in Tax master data
Go to Invoicing > Configuration > Accounting > Taxes, create new undue tax for both sales and purchase

Case Customer Invoice and Payment

Create new customer invoice and choose to use sales' VAT or Undue VAT
Process invoice and payment as per normal, Odoo document number and date should be used as Tax Invoice Number/Date

Case Supplier Invoice/Payment

1) Case Input VAT

Create new vendor bill and choose Input VAT
At vendor bill's tax invoice tab, fill in 2 new fields, Tax Invoice and Tax Date given by your vendor
Validate this vendor bill, the given Tax Invoice Number and Tax Date are set in account.move.tax.invoice

2) Case Undue Input VAT

Create new vendor bill and choose Undue Input VAT
Validate vendor bill, journal entry will be created with Undue VAT
Register payment as per normal, this will create new payment document as per normal
From this process, the journal entry (cash basis) for clear undue is created, but it will be in state Draft
Go to payment document, in tax invoice tab, fill in Tax Invoice Number and Tax Date
Click on Clear VAT button, the journal entry (cash basis) for clear undue will now be Posted

No verified information in OCA: Installation.

info

Data imported from GitHub: this sheet reflects the latest catalog review, not a live lookup. Always check the module documentation and staging before installing in production.