In order to activate Pennylane connector :

Click on "Configuration" (1)  then  "Integrations" (2)

On the Connector page, activate the option Pennylane (3) :

Then make your settings for Pennylane:

1. Company or Individual
2. Send as Draft to Pennylane
3. Use the PENNYLANE invoice number instead of that of Synchroteam
4. Retrieve your API Token to connect Synchroteam with Pennylane

On all your Synchroteam Invoices you can then use the “Send to Pennylane” button (1)

Invoices must be in CREATED status: