line number while invoicing

Hi there, Fayad. I can see that you want to add a number line item to every invoice. Let me provide the steps for sending feedback requests in QuickBooks Desktop (QBDT).

I recommend sending feedback to our product developers to inform them about your request to add a line number to every line item on your invoice. This way, our product engineers can consider including this in future updates.

Here's how:

1. On your QBDT account, click the Help option.
2. Select Send Feedback Online, then select Product Suggestion.
3. A pop-up window displays, then enter your feedback suggestion.
4. Click the Send Feedback button.

Once you complete it, our designated team will review it. 

In addition, you can refer to this article to learn how to personalize your sales forms in QBO: Use and customize form templates.

Comment on the post if you still have concerns about managing your invoices in QBO. I'm here to help in any way I can.