Hello there, @helton137.

Changing the entry from an expense to a bill without deleting the original transaction is unavailable. But you can delete the expense and recreate a bill on your end.

To delete an expense:

1. From the left menu, click the Expenses menu.
2. Choose the Expenses tab.
3. On the Expense Transactions page, find the expense to delete.
4. From the Action ▼drop-down menu, select Delete.
5. Choose Yes to confirm that you want to delete the transaction.

To create a bill:

1. Click the Plus (+) icon.
2. Choose Bill.
3. From the Vendor ▼ drop-down menu, choose your preferred vendor.
4. Enter the necessary information in the fields.
5. Hit Save and close.

Also including this article for a reference about the difference of transactions in QuickBooks: What is the difference between bills, checks, and expenses?

Please get back to me if you have any other questions. I’ll be glad to help. Have a good day.