Hey there, @jeremy22. 

Thanks for reaching back out to the Community with the extra clarification on this problem. Let's try another way to change your contractor's email in your QuickBooks Online (QBO) account. Just follow the easy steps listed below. 

1. Go to the Expenses tab from the left-hand menu bar. 
2. Select the Vendors portion. 
3. From the list, pick the contractor/vendor. 

       4. Press the Edit button beside "New Transaction."

       5. Update the email and any other information needed. 

       6. Click Save when done. 

For additional information about editing contractors, just cruise on over to this link. You can also check out our tutorials page in the QuickBooks Community that may come in handy for your business. 

This should do the trick. If not, I recommend getting in contact with our Customer Support Team. They have more advanced tools to look further into your account to see why you're not able to change your contractor's email. 

Although there are a few ways to update a contractor's email, these instructions that I provided should resolve this problem. The Community is always here to help get your back to running your business as smoothly as possible. Let me know if this helps. Wishing you and your business continued success!