I'll be glad to assist you today, @buckmars12.
The Admin credentials are normally the ones who set up QuickBooks for the first time. If you don't have the old primary admin's info, you'll want to fill up the Primary Principal change form. This way, you can create your new Admin credential and password. Below are the requirements.
- Complete Primary Principal change form.
- A request letter signed by all principals on the company letterhead explaining the reason for the principal change.
- Photocopy of the new principal's government-issued ID.
- Contact QuickBooks Desktop Support to submit the form and other requirements above via Intuit File Exchange.
You can use this link to reach out: Contact Us.
Once you have the new Admin credentials, upgrade your QuickBooks again. Refer to this article for details: Upgrade QuickBooks Desktop Pro Plus, Premier Plus, or Enterprise.
I'm also attaching this link in case you encounter file errors: Fix locked file errors in QuickBooks Desktop.
Still have questions? Drop them below and I'll be happy to answer them for you. Take care and have a great day.