I know that this was a challenging procedure for you, Emma. Let me assist you in processing a paycheck for a terminated member.

Before proceeding, can you share what Payroll subscription you're using? This will help us narrow down the issue you're experiencing.

Since you need to mark the member as active to process the pay run, I recommend accessing your account via incognito. This mode doesn't retain cache to verify if it's a webpage issue. From there, follow the steps below:

1. Select Employees from the left-hand menu. 
2. Pick the employee you wish to reactivate temporarily.
3. Scroll to the bottom and click Re-Activate Employee 
4. Tap Activate.

If it works, clear the browser's cache to start with a clean slate. You can also use other supported browsers as an alternative to your regular one.

However, I suggest contacting our support team if you're still unable to reactivate and pay your member. They can pull up your account securely and investigate this matter further.

Here's an article about managing termination pay and more: Terminate an Employee from within QuickBooks Online.

Furthermore, utilize this reference to update the termination reason: Provide a termination reason for employees to prepare for STP Phase 2.

I'll be around if you have other questions about paying terminated employees. Don't hesitate to leave a reply in the comment section. I'm always here to help.