Checkout Fee Implementation for US Customers

We are seeking a knowledgeable freelancer to assist in adding a checkout fee for our US customers in our shopify store. The ideal candidate should be familiar withshopify platforms and payment processing methods. Strong attention to detail and the ability to implement changes seamlessly within our existing system are essential. If you have experience in this area and can provide a smooth user experience while ensuring compliance with regulations, we would love to hear from you!