There is no limit to the number of offices you can add in Staff Squared.
To set up a new office, navigate to your Company profile.
Scroll down to the Company offices section and you will see a button to Add a new office.
A new window will appear, allowing you to enter the details for the new office.
NB: Be sure to enter the correct country, as bank holidays are recognised based on your allocated office. If you work in the US, but your working pattern isn't set to show this, the system will not pick up on the correct bank holidays for anyone set to that office.
If you have Expenses enabled, set the new office's expenses information and click Save.