How do you change an expense from a cheque (which i dont have) to an expense please?

I've got you covered, simorgz-hotmail-.

If you've recorded the transaction manually, you'll have to delete the cheque and create an expense with the same amount. To delete, here's how:

1. Go to Expenses > Supplier.
2. Select the supplier's name and open the cheque.
3. Click More located at the bottom and choose Delete.
4. Hit Yes to confirm.

Then, create an expense by clicking + New > Expense. I've got this article for reference: Enter and manage expenses in QuickBooks Online

For the cheque added in the Banking page, you can Undo it and update the correct category. To undo, you can follow these steps:

1. Go to Transactions > Categorized.
2. Put a check mark on the transaction and click the Undo button.

Please see this sample screenshot for a visual guide:

The transaction will be added back to the For review page. You can categorise it. Here's an article for the steps: Categorise and match online bank transactions in QuickBooks Online.

I'm always around if there's anything else you need help with your account. Thanks for dropping in and take care.