Let me guide you through the steps, @bl11.

I’ll make sure you’ll be able to locate the option to change the master admin access.

First, you’ll want to delete that user. Once done, please invite him/her again and make sure to give the user a temporary company admin access. Here’s how:

1. Go to the Gear icon, then choose Manage Users.
2. Select Add user.
3. Choose Company admin under user type.
4. Enter the user’s name and email address again, then select Save.

Your user will quickly get an email from quickbooks-email@intuit.com. Have your user accept the invite and let him/her select “Let’s go!”. Once done, please refresh your page. Then select the drop-down arrow under Action. 

I attached a screenshot as your visual reference:

I also added this Help article as your reference moving forward so you can learn more about managing your Quickbooks.

I’m sure you’ll find it helpful, Blas Chacon.