Hi there, @kylie8.

I appreciate you coming here with your concern about not being able to add a PO Box to your employee's information. 

After researching further on this problem, I've discovered that QuickBooks Online (QBO) allows you to enter the Post Office's address as the Physical Address. There are some occasions when QuickBooks doesn't accept a combination of city, county, or zip code. You'll have to make sure that you enter accurate information. You can use the USPS Zip Lookup Tool to validate your address. It has a searchable database to look for a specific location using the street address, city, state, and zip code.

If you're unable to enter it QBO, you may have too much accumulated historical data causing this unusual behavior. Whenever you visit a website, it saves some information from the web page in its cache and cookies. These files allow the websites you visit most often to load faster. Not to worry, clearing them will do the trick.

First, let's try accessing your account through an incognito window to rule out the possibility of a webpage issue. You can refer to these shortcut keys to open an incognito window in all supported browsers:

• Chrome: Ctrl+Shift+N
• Firefox: Ctrl+Shift+P
• Safari: Command+Shift+N

If it works, switch back to your regular browser and clear its cache. This way, you can access QuickBooks with a clean slate. You can also use a different supported one.

After you add your employee’s work location, you may be required to complete the new state or local tax setup. 

That should keep you going! Keep me posted if you have other questions or concerns about updating payroll info. I'm always around to help!