late fees

Hello, askkelli. 

We can activate the late fees setting, set the fee's exact amount, and apply it to the invoice. After you enable the setting, QuickBooks calculates the late fees.

Here's how: 

1. Go to Settings, then choose Account and settings.
2. Click Sales, then, in the Late fees, hit Edit.
3. Turn on the Default charge applied to overdue invoices switch.
4. Select the Percentage of remaining balance: Applies a percentage of the remaining amount of the invoice. 
5. Enter the Amount and/or Percent (%) of the fee. 
6. Tap the Frequency dropdown, then choose how often you charge customers. 
7. If you want to give them a grace period, pick how many days to give them from the dropdown. 
8. Modify the default name Late fee. 
9. Press Save and Done.  

For additional details, check out this guide about late fees: Set up and apply automatic late fees to invoices.

If you need other references in the future, you may want to learn how to send and print invoices. I recommend checking out this article: Create invoices in QuickBooks Online.

Please let me know if you have any additional questions or concerns. I'm more than willing to help. Have a great day!