Isaac
Once you have completed setting up the client's site, please add the following GTM code to their site.
Thanks.


<!-- Google Tag Manager -->
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-PHJPQLH');</script>
<!-- End Google Tag Manager -->

<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PHJPQLH"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->

Also, please install the new GA as well. 

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-D66MXXDQGN"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'G-D66MXXDQGN');
</script>

Hector  - Added

Awesome.
Thank you Isaac.
However, I am not seeing the new Google analytics code above.
That is theirs I see here.

image.png 220 KB • Download

Hector - I have now migrated their website to new hosting on wpengine.

https://www.drfiorillo.com/

Please clear your cache and then check again now. Thank you.

Just FYI - I have now removed all of the old analytics code from their website.

Good morning Isaac. 
Excellent work. 
Thank you. 
I have also updated their PRP issues on the site and reworded it. 
I see the correct GA and GTM now. 
Thank you.