When an invalid tax number is entered, an error message will be displayed: "No valid VAT; tax will be charged." Please be aware that if you add an invalid VAT number to your account, invoices will include VAT.

To avoid this issue, ensure that your VAT number is valid. You can verify its validity by using the following link: https://ec.europa.eu/taxation_customs/vies/.

If you encounter any questions or need assistance, please don't hesitate to reach out to us at support@yumpu.com. We're here to help!