How can I remove this outline/boarder??

Haven't been able to remove the slight outline or board that appears.

Hello,

Thank you for reaching out.

Please inject the following CSS code in the Form Designer:

[data-component="calculation"] {
    box-shadow: none !important;
}

Once applied, the field should look like this:

Please give it a spin and don't hesitate to reach out if you need further assistance.

Related Guide: How to Inject Custom CSS Codes