For fields to be added to invoices, they need to be added to billing. To do this, go to B2BKing -> Registration Fields, click on the field(s) you need, and enable the 'Add custom field to billing' checkbox.
We have created 2 B2BKing custom fields and enabled the "add custom field to billing". The fields are: "new test field" and "VAT Number". We can see these fields on the checkout page as billing fields:
If fields have been added to billing, most invoice plugins will automatically display them on their invoices.
We recommend you use the WooCommerce PDF Invoices & Packing Slips by WP Overnight plugin. The free version is sufficient.
We place an order and we see the fields in our previous screenshots have been added to the PDF invoice:
If you would like to do custom work and display fields in a more specific or unique manner, there are multiple ways you can add custom fields:
Here you can read more about invoice customization options with this invoice plugin.
Here you can find a list of plugin hooks for the invoice plugin.
Note: Generally, other invoice plugins should work as well, although the plugin we recommend above is the most popular option.
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