The Proceed to checkout button in the cart page will take the user to the first page in the form with the required fields. Since you have created a single page form, it will show the same page. Users can select the products, scroll down to complete the delivery details and submit the form.  Note: You can split the form into two pages. The first page should only have the products and the second page will have the required fields for delivery and the order summary. Once you make this change, you can map the second page with delivery details as the checkout page. Once users add the products to cart, they can click on the cart icon in the header and then click on the checkout button to navigate to the delivery details page. For details, refer to the help article below. Configure checkout page https://neartail.com/order-form/configure-checkout-page.html