Thanks for bringing up here in the Intuit Community, @studio7.
To correct your transactions in QuickBooks, you need to exclude it first.. Let me show you how:
1. Go to the Transactions tab.
2. Open the transaction that you want to run.
3. Put a check mark beside Exclude this transaction.
4. Select Save.
After, you manually add transactions in your QuickBooks Self-Employed.
If you wish to categorize your transactions, you can use this article: Categorize and edit transactions.
Please drop a comment below if you have any questions. We're always here to back you up.