Thank you for reaching out to the QuickBooks Community, cbrandt1. When opening a new bill, the Category Details would collapse and only show the Item Details section. A quick fix would be to expand the section so you can add the expenses. Here's how:
- Go to the Category Details and click the arrow.

- This is how it would be displayed, showing both sections.

Please let me know how this goes. The Community and I will be around to assist you. Take care and be safe.