Good day to you, @abejab-hotmail-c.
I can help you correct the date you've entered in your QuickBooks Self-Employed (QBSE). Are you referring to entering a transaction? If so, we can edit it and update the date. Let me guide you how.
- Go to the Transactions menu.
- Locate and select the transaction you want to edit.
- Change the date of the transactions and click Save.

Let me also add this link that you can use for guidance: Add older transactions to QuickBooks Self-Employed. This can guide you in adding older transactions to your account.
In case you're referring to something else, you can always get back to me. I'm more than happy to help you.