Hi SPF30,
It's a pleasure to see you in Community. Welcome! QuickBooks Online automatically matches your transactions, so you can reconcile your accounts effortlessly. It's important to ensure the items are recorded accurately for a smooth process. I'd be glad to help!
When categorizing your transactions, you'll need to include applicable sales tax. This will let QuickBooks find an exact match with your records. Sales tax recorded on your bills and expenses would indicate the amount you paid on that purchase.
If you have any other questions, please don't hesitate to reach back out. We're always happy to assist!