WordPress embed code
Add a "Custom HTML" block in WordPress and paste this in.
<iframe id="etc-estimate-form" src="https://treecareco20.com/embed" style="width:100%;border:0;min-height:1400px;" title="Request Your Free Estimate"></iframe>
<script>
window.addEventListener("message",function(e){if(e.data&&e.data.type==="etc-form-height"){document.getElementById("etc-estimate-form").style.height=e.data.height+"px";}});
</script>