Hello Louise, thanks for the reply. I am using formula based fee>> I am using this $paynow = ( WC()->cart->get_subtotal()/ date(‘t’) ) * (date(‘t’) – date(‘d’)); I tried passing the $paynow value using the filter dibs_easy_create_order_args to here https://staging.fibio.se/wp-content/uploads/2024/04/payAmount.png but I didn’t see the updated value in the button.