Hi there, DR. I understand how important it is to ensure your GST/HST reports are accurate when filing your taxes.
The GST/HST Summary Report data relies on the entries you've created in QuickBooks Online. In this case, ensure that all transactions in the report have the accurate tax codes applied.
Then, review the GST/HST Summary Report once again. Please ensure the date range and filters match the invoices and sales report.
You can click on the amounts in the GST/HST Summary Report to drill down into the transactions. This approach can help you identify any specific entries contributing to the discrepancies.
For further guidance in reviewing this, I recommend consulting an accountant.
Please let us know if you have further questions. We're always here to help.