The Bank Feeds tool 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. It enters the details for you so you don't have to enter transactions manually. Then all you have to do is approve the work.
It sounds like you're manually uploading your transactions into your QBO account. If you'd like to sync your account for automatic uploads, the steps are quick and simple.