How to change an expense from converted to non-converted to add to invoice. I removed an expense from an invoice to hold until next month. However, it shows as converted.

Thank you and welcome here in our Community, @DGfire. I'll share information about billable expenses in your invoices in QuickBooks Online (QBO).

Please check the expense if the billable box is checked, if not, the expense will not be shown on the invoices. From there, you'll have the option to check the billable box and choose the specific customer. 

Here's how:

1. Click + New and choose Expense.
2. Select the Payee.
3. From the Category column, select the expense account for the transaction.
4. Enter the description and amount of the expense and select the Billable checkbox.
5. In the Customer column, select the customer you want to bill for this expense.
6. Fill in the necessary field. Then, hit Save and close.

For additional information, you can click this article: Enter billable expenses.

Next, add the billable expense to the invoice. I've outlined the steps below:

1. Click the + New.
2. Select Invoice.
3. In the Customer ▼ dropdown menu, select the customer you created a billable expense for. This opens the Add to Invoice window.
4. Pick Add on the billable expense you want to charge to your customer.
5. Once done, click Save and Close.

Please refer to this article to see steps on how to Uncheck the box in the Billable column of an entry to delete a billable expense charge: How to remove a billable expense charge.

If you have any other questions about billable expenses, please feel free to leave a comment below. I'll get back here as soon as I can to help you again. Thanks for dropping by, wishing you a good one!