Hey Hannah, I'm good I hope you also.

You can use this code to autofill and then hide the both fields.

Step 1: Remove 'wysiwyg=true' from the form.

Current-

After-

Step 2: Add this given code at the bottom in the script file.

Code-

if (window.location.href.indexOf("360003074611") > -1) {
document.querySelector('#request_subject').value= "Write your text for subject field.";
document.querySelector('#request_description').innerHTML= "Write your text for description field.";
document.querySelector('.request_subject').style.display= "none";
document.querySelector('.request_description').style.display= "none";
}

You need to remove my form ID and add your form ID where you wanna hide these fields.

First, open that form and then you will see the form ID in the search-bar.

Copy that and add in the script code here:

if (window.location.href.indexOf("Add Here") > -1) {

If any query Feel free to ask :)

Thanks