All transactions for a credit card were categorized. I uncategorized them by accident. Can I revert them back to categorized?

I acknowledge that you accidentally uncategorized all transactions from your credit card that need to be categorized in QuickBooks Online (QBO), @Saulholding-gma. Let me share some knowledge that will help you.

All of the uncategorized transactions will go back to the for review tab. You can then sort and categorize them.

You can sort it back on the banking page from the review tab. Here are the steps on how to retrieve it:

1. Open your QuickBooks Online Account, then go to the Transaction tab at the left panel. 
2. Choose Bank Transactions.
3. Click the For Review tab.
4. Select all the transactions that you need to categorize.

In addition, learn how to reconcile your accounts and match your bank and credit card statements. Check out this article: Reconcile an account in QuickBooks Online.

If you still have other questions regarding credit card transactions and categorizing, feel free to add a reply below. I'll be glad to answer them for you.