i excluded previously uploaded banking transactions and now when I tried to upload the banking transactions, quickbooks can't seem to upload the transactions anymore

The reason your QuickBooks isn't allowing you to re-upload bank transactions is that it remembers even the excluded transactions to prevent mistakes or duplicates, Gctai2000.

To assist you properly, Did you receive any error messages or notifications from QuickBooks when you attempted to re-upload the transactions? Any additional info or screenshot would be appreciated.

When you exclude a transaction in QuickBooks, it records that action. So, when you try to re-upload those transactions, QuickBooks flags them as duplicates and blocks the upload to maintain data accuracy.

To prevent QuickBooks from recognizing previously uploaded transactions as duplicates, you can modify the descriptions slightly in your CSV file before re-uploading the bank transactions. By altering the transaction descriptions, QuickBooks will treat these entries as unique, allowing for successful re-upload. However, please ensure that the modifications do not compromise the clarity or accuracy of your financial records.

Refer to this article for guidelines when you upload transactions into QuickBooks: Manually upload transactions into QuickBooks Online.

If you need help in categorizing your entries to avoid double transactions, refer to this article: Categorize online bank transactions in QuickBooks Online.

Please leave a comment below if you have more questions about this or anything else. The Community team is here to assist you.

@gctai2000 

Try opening your QBO account on any private/incognito browser.