When trying to access payroll and get a message 502 Bad Gateway. I have tried using Firefox and Chrome. No success with either.

Hi there, poirier-donna.

I appreciate you for trying to access payroll using other browsers.

I've checked and and verified that there's ongoing payroll issue. Our product engineers are currently working on a permanent fix.  

Thus, I recommend contacting our QuickBooks Support Team to add you as one of the affected users and notification list. You can follow the steps below:

1. Click Help (?).
2. Click Contact us.
3. Enter a short description of your concern like getting 502 bad gateway when trying to access payroll. 
4. Then, click Let's Talk.
5. Click Get a callback.
6. Enter your contact information.
7. Select Call me.

I'll also send a reply here if there's any available information for the investigation.