If you're keeping track of outstanding Bills in ZipBooks, you'll want to log payments so you know once those bills have been paid.
Here's how to mark your bills as paid:
Login to ZipBooks and select Transactions from the menu. Then Bills.
Find the bill you're looking for and click on it.
Click the Add Payment button at the top
Enter the Date, Amount paid and Account the bill was paid from. Add any relevant tags and notes.
Click Log Payment.
Upload any relevant documents (like a receipt) by drag-and-drop or by clicking the green + button.
That's it! Now you have record of your payment and a bill to match your transaction history.
Note: You don't need to enter a bill for every expense transaction. Instead, the Bills function is primarily helpful to keep track of outstanding accounts payable (expenses that will paid in the future).