There are possible reasons why you're unable to import bank statements in QuickBooks, even when using the CSV format, Mariam.
Before we proceed, since you mentioned that you're having trouble uploading your bank statements in QuickBooks Online (QBO), could you let us know if you received any error messages during the upload process? If so, please provide some screenshots. This will help us give you the most effective advice.
Meanwhile, while waiting for your response. Please know that these are the Common errors for importing bank transactions using CSV in QuickBooks Online are the following:
Incorrect mapping
Inaccurate Formatting
If the issue persists after checking the mapping and formatting, I recommend troubleshooting, which includes clearing your browser's cache and cookies to refresh the system. Also, ensure you are using a supported and up-to-date browser for optimal QuickBooks performance and an enhanced user experience.
If you're looking to improve your financial management skills, our QuickBooks Live Expert Assisted team can help. They offer expert, personalized advice and solutions to help you tackle current challenges and refine your financial strategies.
Keep us posted so we can further help you if necessary.