Connect SendOwl to Quaderno

Quaderno supports automated billing and VAT, GST, and sales tax compliance for SendOwl stores. Every time you process an order, SendOwl sends the transaction data to Quaderno, which generates an invoice and can automatically email it to your customer.

Although SendOwl calculates taxes at checkout, Quaderno ignores those figures and recalculates tax itself using the transaction data it receives. Configure your tax rules in Quaderno to ensure accurate invoices.

To connect SendOwl to your Quaderno account, follow these steps:

In your SendOwl account, go to the settings page and select API.
Select Add API Key. Enter a name for the new API key and check the options Products, Orders, and Discounts.
Copy the Key and Secret values of the new API key.
In a new tab, go to the integrations page and select SendOwl.
Paste the API keys you copied in step 3 and click Connect account.
After connecting, Quaderno generates a personal webhook URL. Copy the Webhook URL.
Back in your SendOwl account, go to the settings page and select Webhooks. Click Add a webhook. See SendOwl's webhook documentation for more detail.
Paste your webhook URL and select the New payment event. This lets Quaderno receive SendOwl's sales and refunds.
Click Create.

Quaderno will now generate an invoice for every payment and a credit note for every refund. You'll also get tax insights through reports.

Upsells are not fully supported. They'll appear on your invoice as a single line item with the total amount.

If you have B2B sales, enable SendOwl's standard VAT number field. Quaderno will then receive the customer's tax ID, display it on the invoice, and automatically apply reverse charge when the tax ID is verified.