Thank you for the screenshots, that was helpful.
I understand you would like to add “Additional Information” text above the order notes field in the checkout. This is not available by default in WooCommerce. You can either use the extension Checkout Field Editor or customize the checkout page with custom coding.
You can learn more about how Checkout Field Editor works here:
https://docs.woocommerce.com/document/checkout-field-editor/
If you want to try any of our products, please note we have a 30-day refund policy. If the product doesn’t work the way you need or you think another product would work better, we are more than happy to offer a full refund. You can read more about our refund policy on our website here: https://woocommerce.com/refund-policy/
Incase if you’re looking for custom code help to customize the checkout page, you might be able to find someone willing to volunteer their time and knowledge in the free PHP support forum at PHP Builder or within the Advanced WooCommerce group on Facebook.
For assistance with customization or development with your site, we recommend reaching out to someone on our customizations page.