They do not have GTM so please set up one and send me the code so I can ask them to add to website.

Will add it to my list and take care of it accordingly. 

Chris here's the GTM code for the client.
Account created, added other team members as ADMIN, sent invites. 
Added OptinMonster code and container, set to live. 

<!-- 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-59RW564');</script>
<!-- End Google Tag Manager -->

<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-59RW564"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->

There are two websites, can we use the same GTM for both or do we need to separate ones. Remind me of this.

Another reminder added to my list. I have about 8 now. :)
BTW, we can use the same GTM for both sites as long as we are doing similar services. Just checked and there's still no GTM on their site as of yet. 

Email sent to client & developer to have this code installed in https://crmcaesthetics.com site. 

Chris  
I checked this morning and the GTM code has still not been added to the site. 
It has been 6 days since I contacted Bryce about it. He responded back then that he would take care of it. I sent him a reminder. I have also sent them code for 2nd site = crmcwellness.com

Good morning team.
I sent the GTM code to Narek their developer. But they installed the one for CRMCwellness.com instead. I then followed up and informed them of this.
This morning I got an email and they have since changed it. I have verified that the correct GTM code has been added to the site.

GTM CRMCaesthetics.png 657 KB • Download

Provided the other GTM for the other site now as well. Will wait till that one is installed to verify.