Hello there, mark405. The best way to get them into QuickBooks Online (QBO) is to upload them manually. Log in to your bank's website and download the missing transactions as a CSV, ensuring it matches the format QuickBooks requires. Once you have the file, go to Accounting > Bank transactions > Link account dropdown > Upload from file. Then, follow the on-screen prompts to map your file's columns.
If you'd prefer to enter them one by one rather than using a file, you can add them directly to your account history by finding the specific account in your Chart of Accounts. If the bank feeds later import the same transactions, you can exclude any future duplicates from your For Review tab.
Please note that transactions are only removed from the list if they have been manually excluded.
You can revisit this thread if you have follow-up questions.