Online Banking (also known as Bank Feeds) is one of QuickBooks Online’s most helpful and time-saving features. If you connect an account, QuickBooks automatically downloads and categorizes your bank and credit card transactions for you. Then all you have to do is approve the work. I'll help you get your credit card account connected.
Follow the steps in this comprehensive article to see how to add your account to the bank feeds in QBO: Connect bank and credit card accounts to QuickBooks Online. As explained in this article, the process is quick and simple. Syncing your account will only bring in the last 90 days of transactions, so it's important for you to download any transactions beyond that point manually.