The transition period put in place after the UK left the EU comes to an end on 31st December 2020. At this point new tax rules will come into place, which will have an impact on Apps using the Sage Accounting API. It is important that all developers using the Sage Accounting API understand the changes that are being made to the API and how this impacts consuming apps.

It is likely that you will be impacted if:

Your app is creating purchase or sales transactions that involve setting a tax amount (such as quotes, estimates, sales invoices, sales credit notes, sales corrective invoices, purchase invoices, purchase credit notes)

AND either of these cases apply

  1. You have users of your app that trade between Northern Ireland and England, Scotland or Wales
  2. You have users of your app that trade between the UK and EU

If you are impacted, you will be required to make changes to your app by 31st December 2020 to ensure that transactions are not rejected as invalid.

We are currently working on a detailed guide to support you through this process, which will be published in the coming days. Sage is monitoring the ongoing negotiations between the UK and the EU closely and will continue to update the product and API where required.

If you have any questions, please reach out to us at [email protected] or at Sage Developer Community