Sales tax and VAT software for Odoo

In a few countries, yes. Odoo's UK localization sends the tax report through the MTD-VAT API to HMRC, its Belgian module lets you file directly through Intervat, and its Indian module pushes GSTR-1 to the GST portal and pulls GSTR-2B back. Everywhere else the generic answer is different. Odoo's own words are that the amounts in the tax return report can be used to complete tax declarations, with a one-to-one correspondence that allows amounts to simply be copied from one to the other. Australia is the clearest case: Odoo states the BAS report is not directly submitted to the ATO, and that businesses copy the values onto the ATO portal. Commenda files across all 50 states and 70+ countries on each jurisdiction's own frequency, and files amended returns where a period needs correcting.

No. Odoo's US localization page documents no sales tax filing path. What it documents is calculation: default sales and purchase taxes are created automatically when the Accounting app is installed, and you manage them from the Taxes menu. For jurisdiction-level rates Odoo points to Avalara AvaTax, and its own AvaTax documentation says returns are handled in Avalara's management portal rather than in Odoo. Commenda files in all 50 states, tracks remittance per jurisdiction, and posts the liability and the filing confirmation back to your ledger.

Not as far as its documentation goes. Nexus and registration thresholds do not appear in Odoo's tax, localization, or AvaTax pages. Odoo's model is that you decide where you are registered, then create the taxes and fiscal positions to match, so anything sold into a state you never set up is taxed at nothing and counted nowhere. Commenda measures the same Odoo invoices against economic and physical thresholds in all 50 states, every EU member state, and 70+ countries, and notifies you at 80% of a registration threshold. A short questionnaire covers physical presence, because a warehouse or a remote employee never shows up on an invoice.

It changes what reaches you and when. Odoo provides standard support for each major version for three years, and states that beyond those three years extended support carries a mandatory additional fee. On Odoo Online a major-version upgrade is mandatory every two years. On-premise, Odoo says you can stay on the same version indefinitely, while not recommending it. It also states that a database with custom modules cannot be upgraded until a version of those modules exists for the target release, and that keeping a customization working is the module maintainer's job. Commenda sits outside your Odoo database, so your registrations, rates, and filing history do not move with your version.

It produces the report. Odoo's EU intra-community distance selling setting creates the fiscal positions and taxes for local VAT rates, and its OSS section explains how to generate OSS Sales and OSS Imports reports as PDF, XLSX, or XML. Its own instruction for the last step is to log into the platform of your competent federal authority and submit it onto the OSS portal. Commenda registers you for OSS and IOSS, files the returns, and arranges fiscal representation where a country requires it. OSS covers cross-border B2C sales across all 27 member states plus Northern Ireland from one registration, and IOSS covers imported low-value goods.

Not as a certificate record. An Odoo contact holds a tax ID and a fiscal position, and Odoo verifies EU VAT numbers against VIES and marks them intra-community valid. Under the AvaTax integration, exemption codes sync from Avalara, and Odoo documents that customer certificates are added in Avalara's console and that attaching certificate images requires Avalara's Exemption Certificate Management subscription. Storing a certificate is a different job from getting one. Commenda collects them through a self-service portal that can carry your branding, validates each at upload, applies it automatically in the states where it is valid, and chases expiries. SST and MTC multi-state forms are accepted alongside single-state ones.

Each company carries its own localization, and that constrains the structure. Odoo states that branches always follow the parent company's localization, so entities operating in different countries should be set up as companies rather than branches. It also warns that selecting a different fiscal localization package is only possible if no entry has been posted, so the choice hardens quickly. On the UK side, only one company and one user can be connected to HMRC at a time, and you reset the authentication to submit for the next one. Commenda covers multiple entities on one dashboard with consolidated registrations, exposure, and filings, and new entities inherit the same workflow.