I'm trying to invoice for expenses. For some reason, no expense column is showing up in the expenses interface

Let me assist you in managing your expenses, @fullclev.

An expense is the money a business spends at the time of purchase, while a bill represents the amount that your business owes and will pay later. Charging an expense is not yet possible. Alternatively, you can perform any of the following to address your concern:

• Use the expense as payment towards your bill, or delete the expenses
• Create a new bill, and pay it

Here's how you can apply the expense as payment:

1. From the left menu, click Expenses.
2. Select the appropriate expense or check transactions.
3. Change the Category details section to Accounts Payable (A/P) under the Category column.
4. Click Save and close.
5. Open the bill, and click the Make payment button.
6. Under the Outstanding Transactions section, mark the bill you want to pay.
7. Under the Credits section, mark the expense transaction. We'll use it as a payment.
8. Make sure the AMOUNT PAID is equal to zero (0.00).
9. Click Save and Close.

I've got you an article for more details: Enter a Credit from a Vendor.

On the other hand, follow this article for detailed steps on entering and paying the bills: Enter and manage bills and bill payments.

In case you need tips and related articles in the future, feel free to visit our QuickBooks Community help website for reference: QBO Self-help.

Don't hesitate to let us know if you have other questions about managing bills. We'll do our best to provide assistance. Stay safe