Yes, I'm happy to help you with this, @siefkenps. I have a way on how to transfer the QuickBooks master admin role.

I'll make sure that you can change the master admin as quickly as possible. This way, you can manage all the data in your QuickBooks Online without any restrictions. 

Since you don't have access on master administrator's email, I'd suggest directly proceed with requesting the primary admin rights, as my colleague mentioned in this thread. 

Here's the step-by-step procedure: 

1. Gather your documents for the request. This will depend on business type. Click the link in Step 3 to see the need documents.
2. Sign in to your Intuit Account. 
3. Go to this link to see the form: Request to be the primary admin or contact.
4. Complete the form, then send your request.

Once done, your case will appeal to our team. If you need extra help to kick start this process, feel free to reach out to our support agents. They'll be ready and waiting to transfer your admin role in no time! To reach them visit this link and select your product: Contact QuickBooks products and services Support. Make sure to contact them within business hours to ensure a swift response. 

In addition, check out our QuickBooks Community Article to help you manage your QuickBooks data, user management, user credentials, and others. Please select your specific products to see the precise articles. 

Feel free to drop a line if you're struggling with QuickBooks. I'd be happy to offer you my advice, and I'll be up in the cabin, siefkenps.