Greetings. I want to provide some insights about handling your invoices in QuickBooks Desktop.

You can only manually add a FOB value when entering it on an invoice. While the feature to set it as default is currently unavailable in QBDT, I recommend providing feedback about it. This is a valuable way to communicate your needs and preferences to the product engineers. Here's how:

1. Open the Help menu, and go to Send Feedback Online.

2. Select Product Suggestion.

3. Fill out all necessary information.

4. Once done, click on Send Feedback.

Here's an extra module you can browse about keeping track of your customer's payments: Receive and record invoice payments in QuickBooks Desktop.

Fill me in if you need more guidance about this matter. I'm always ready to back you up. Take the best care!