You can easily add the billable expense, Casey6.
I'll guide you how:
- Open the invoice.
- Click the Less than arrow beside the BALANCE DUE.

- Under Add to Invoice, select the Billable expense, then click Add.

- Click Save and close.
Let me share the article on how to enter billable expenses. This shows how you can record and track billable expenses so your customer can reimburse you.
Get back to this thread if you need more help with this. We're just around for you.