I am trying to create an invoice for a spa and when i hit save, it shows paid 4 days ago. Why does it say that? Payment due is 0.

Hi there reli188,

Welcome to the QuickBooks Community! QuickBooks Online makes recording invoices and payments against those invoices a simple, streamlined process. When your invoice is showing as paid but you haven't recorded a payment against it yet, I can see how that might cause some confusion. Let me help you figure out what's happened.

When a customer over pays on an invoice or has an open credit memo, that amount can automatically apply to the next open invoice for that customer. To identify if that's the case, you'll want to view the payment that's associated with the invoice you just created. Navigate to the Sales tab and select the invoice to open it up. Since the invoice is showing as paid, you should see a blue hyperlink that reads View payment. 

When you click the View payment link, a Receive Payment window should open up. The Outstanding Transactions section of this window will show you the invoices that are connected to this payment. If you'd like to remove your new invoice from this payment, find it from the list and un-check the box to the left. Then click Save and close. Now when you view your invoice it'll show the full balance owing and won't be marked as paid. 

If it's an open credit memo that was the cause of your invoice being automatically marked as paid, there's a setting you can adjust to prevent this from happening. Here's how:

1. From the Gear icon, navigate to Account and settings.
2. Select then the Advanced tab on the left.
3. Find the Automation section and use the pencil icon to edit.
4. If Automatically apply credits is on, click the switch so that it shows grey or off.
5. Hit Save and Done to save these changes.

If you'd like to work with somebody in real-time to help you identify the source of the payment, our team of trained support agents can help you out. With a screen share, your agents will be able to see what you're seeing to help you resolve this issue and prevent it from happening in the future. Here are a few ways you can get in touch:

Phone: Call 1-855-253-1536 from Monday to Friday from 9 a.m. to 8 p.m. EST.
Schedule a Callback or Chat: Click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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I know you'll have this sorted in the blink of an eye! Enjoy your Monday.