Hi there, ALaaELdin. I'm here to help you isolate this.

Based on the error, you likely have formatting issues when importing bills in QuickBooks Online. Make sure to carefully review and make any necessary edits to the mapping of the CSV file. Afterward, save a new copy of the file. Once done, proceed to reimport the updated file to your QBO company. See this for the detailed steps: Import your bills in QuickBooks Online.

If the issue persists, I recommend contacting our Customer Support team. This allows them to investigate further and guide you on what to do next.

As a workaround, you can manually enter the bills by using the +New menu. Here's how you can do it:

1. Click on + New.
2. Select Bill.                                                                                                                                                                                   
3. In the Supplier ▼ dropdown, pick a supplier.
4. From the Terms ▼ dropdown, choose the bill's terms. This is when your supplier expects to be paid.
5. Add the Bill date, Due date, and Bill no. as they're recorded on the bill.
6. Enter the bill details in the Category details section. Go to the Category dropdown, and choose the expense account you use to track expense transactions. Then enter a description.
7. Enter the Amount and tax.
8. If you plan to bill a customer for the expense, hit the Billable checkbox and enter their name in the Customer field. Learn more about billable expenses.
9. When you're done, click on Save and close.

For future use, see this guide to find out ways of applying payments toward bills: 

• Record and manage bill payments in QuickBooks Online
• Learn the difference between bills, cheques, and expenses in QuickBooks Online

Please let us know if you need more help handling your bills. We'll make sure to respond as soon as we can. Taka the best care!