1. Open the bank feed. Go to Transactions (or Banking), then select the credit card account. Every charge that's posted to the card shows up here, usually within a day or two of the purchase.
2. Review each transaction. QuickBooks guesses a category based on the payee and your past categorization. Check it; it's often right, but not always, especially for a new vendor.
3. Confirm the payee. If QuickBooks hasn't matched it to an existing vendor, add one or pick the right one from the list so your vendor reports stay clean.
4. Add or match. Click Add for a new transaction, or Match if it corresponds to something already entered (a bill you recorded manually, for instance).
5. Set up a Bank Rule for repeat vendors. Under Rules, you can tell QuickBooks "anything from this vendor, in this amount range, always goes to this category." Once a rule exists, matching transactions categorize themselves; you just confirm the batch.