Isaac  
How are you?
Per our email conversation,
Can you please add the GTM code to this client's website?
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-MV2884H');</script>
<!-- End Google Tag Manager -->

<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MV2884H"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->

Hector - DONE

https://classicdentala.wpengine.com/

Isaac, I thought the URL was going to be dentistnj.mysculpt.net?
Or will it be transferred from there?

Hector - We are creating a new website for them which I believe will replace their current website on http://classicdentalarts.com/.

Chris - Please confirm. Thank you.

Regardless GTM will be automatically transferred from the staged website when we will make it LIVE.

Okay, I just wanted to be sure about the transfer once completed. 
Thanks. 

Isaac
Can you please remove the two Google Analytics accounts on the site now?
Once done, please add this one = 

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-174185363-1"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'UA-174185363-1');
</script>

Hector  - will have to add this to the new site as we do not have full access to the other account 

Isaac  
you can add it to the WP LP for now 
https://classicdentala.wpengine.com/invisalign-manalapan/
Thanks. 

Hector - ADDED

Thanks Isaac.