You can do this by following these steps:
Go to the Financials tab
To the left-hand side in the Records section, click on Set Up
Click on Departments
In the next window, click the Edit icon
Select the last line of departments that have already been created, then press the Tab button on your keyboard until it creates a new line
Fill in your code, name and short name.
Hit Tab on your keyboard again and then click Save at the top.
