FreeAgent Sync for WooCommerce

In some booking websites, we pass in custom fields to Woo. For instance, we may pass in a service fee, a city tax, a security deposit, etc. These would be additional lines in the Woo order.

The feature request is to be able to select those custom fields and set where they are used. For example, if our Woo order has a Product line, Service Fee line, Deposit line, in the settings we would select Set Default Product Item Type: Products as we do now, but the additional lines to be added to the invoice would be something like:

Add new Custom line: -> Service fee, Security Deposit

We could add as many custom lines as the system allows.

The Woo order has already been calculated, but of course when the invoice is generated showing these new lines the invoice will need to be the same amount, i.e. calculated correctly.