Please note: The monthly costs per administration that you link to your accounting package are €17 for a monthly subscription and €15 for an annual subscription (billed annually). The third and subsequent linked administrations are free of charge.
To get the new Twinfield administration into Simplicate, you need the administration code. When you hover your mouse over your company name in the top right corner of Twinfield, the administration code will appear below it:
In Simplicate, go to settings > add-ons, integrations > Twinfield. Under 'Add a new available administration', enter the relevant code and click on add:
After you click on add, the administration is added immediately! You can now select it under 'Twinfield administration*'.