I have an invoice that I started it keeps saying paid when I haven't even sent it to the customer yet and still need to add more days.

Thanks for reaching out to us Katie,

I want to make sure this issue is resolved for you. Usually invoice in the system are marked as pain when a payment is received or if there is a credit that was automatically applied to the transaction.

Since you did not receive any payment for this, there is a preference I want to check so we can determine what's causing this odd behavior. For now, you may follow the following steps, then recreate the invoice after:

1. Click on Settings ⚙, then select Account and settings.
2. Go to the Advanced tab.
3. Tap Edit ✎ in the Automation section.
4. Check if the option to Automatically apply credits is enabled (with a green slider). If yes, you need to disable it so any pending credit memos are not applied automatically to new invoices.
   
5. Make sure to press Save, then Done.

Once you're done with this step, create an invoice again and see if it still appears as paid. If the problem comes back, I highly recommend that you reach out to our Support Team to report the problem. Here's how to get in touch with our live support:

1. Sign in to your QuickBooks Online company.
2. Press (?) Help.
3. Select the Search tab, and click on Contact Us to connect with a live support agent.
4. Type in, "Account Management and Billing".
5. Choose a way to connect with us:
   
   • Start a chat with a support expert. Live chat M-F, 8:00 AM to 9:00 PM ET; S-S, 9:00 AM to 6:00 PM ET
   • Callback
     

Please come back here if you need further assistance with this topic. I'll be right here to ensure this is taken care of. 

All the information given is how to fix if you use QB One-Line but how do you fix is you use QB Desktop?

Hello ArrowArc. I recommend troubleshooting the display issue using the QuickBooks Tool Hub. The QuickBooks Tool Hub is designed to help fix issues in QuickBooks. Check out this article here that shows you how to effectively use the Tool Hub to your advantage. You're more than welcome to reach back to me in case you have questions while going through the article.