What is the "Permit Number" box for in expenses?

I'm here to help clear things out for you, brew. 

In QuickBooks Online, the permit number box in expenses is where you enter the permit number linked to a specific expense. This field is convenient if you're running a business since it will serve as a tracking detail for your expenses related to permits, licenses, or other regulatory requirements.

Additionally, when you set up multiple sales taxes in QBO, this field will appear on your expenses page.

You can learn how to enter billable expenses in QBO and track them for invoicing: Enter billable expenses in QuickBooks Online.

Please comment below if you have further questions regarding the permit number box and expenses. The Community space is always here to help you.