Sales tax and VAT software for Rillet

Both, depending on the country. Rillet calculates VAT and GST natively where it has built the rates, covering UK VAT including the reverse charge, Australian GST with its BAS variants, and Canadian GST, HST and PST at line level. US sales tax is different, and Rillet says so plainly: native VAT and GST cover international markets, and domestic sales tax runs through integrations. Its own recommendation for the US is a third-party engine. So the question is not whether you need something alongside Rillet, it is what that something covers. Commenda covers US sales tax, EU VAT and GST across 70+ countries from one platform.

Because that is the only return it files. Rillet added end-to-end HMRC Making Tax Digital VAT in August 2026, with one-click or automatic approval and no extra fee, and it is a genuine filing capability. Everywhere else, including Australia and Canada where the calculation is native, you get a report and someone on your team still files it. Commenda files across all 50 US states and 70+ countries on each jurisdiction's own frequency, with amendments where a period needs correcting. If the United Kingdom is the only place you file, Rillet has you covered.

The number of vendors, and what the exposure figure is measured on. A tax engine connected to Rillet calculates on the invoices that pass through Rillet, and files on its own subscription. Commenda reads your Rillet ledger and every other channel you sell through, across 100+ integrations, into one ledger tagged by ship-to state, then registers and files from that. Teams usually move because they were holding a ledger, an engine, and a filing relationship, and wanted one accountable vendor instead of three.

No. Nexus appears nowhere in Rillet's published API, and every mention of threshold monitoring on its site is a capability it attributes to a tax partner. That gap matters because sales tax liability starts on the day you cross a threshold, not on the day you notice. Commenda notifies you at 80% of a registration threshold so the registration can go in while you are still under it, and a questionnaire covers physical presence as well, since an office or one remote employee creates an obligation with no revenue threshold to cross first.

Not as filings. Ireland and Austria appear in Rillet's changelog as VAT rates applied on invoices, and Lithuania and Switzerland appear as reporting, which is useful for closing the books. No EU member-state VAT return, One Stop Shop, Import One Stop Shop, or e-invoicing mandate support is published anywhere on its site. The fourteen European countries Rillet names are bank feeds, not VAT registrations. Commenda registers and files VAT across the EU including OSS and IOSS, which is what distance selling into the bloc actually requires.

Not Rillet. It names evidence management, giving exemption certificates as its example, among the reasons to use a specialized third-party tax engine, so certificates live in whichever partner you chose. Commenda collects them through a portal your customers upload to, validates each one on upload, stores it against the customer record, and applies it automatically on future transactions where it is valid. During an audit the certificate is already on file, which is the point at which the difference is felt.

Your invoices and credit memos, the ledger behind them, and the entity each one belongs to. That one connection feeds three things: sales tax and VAT calculation, your monthly close, and the intercompany testing behind transfer pricing. You choose which entities and which data models sync, and what Commenda can read and write, and those scopes stay visible and editable after setup. Access runs per user and per entity, so auditors get read-only access without shared credentials.