I keep creating new invoices and it’s saying it’s been paid before I even send it ?

You've come to the right place, harrypeasland. I'm here to assist you and provide you with clear steps to resolve this issue promptly.

It seems that there may be available credits automatically applied to the customer's invoice. This occurs when the Automatically apply credits option is enabled in your settings. To address this, we need to disable this option.

Here's how:

1. Go to the Gear icon and select Account and Settings.
2. Select the Advanced tab and go to the Automation section.
3. Turn off the Automatically apply credits function.
   
4. Click Save and then Done.

By doing so, you'll be able to create new invoices without them being marked as paid beforehand. Then, follow these steps if you wish to remove the applied credits:

1. Open the invoice.
2. Click on the link below the payment status and then select the date. This opens the Receive Payment page. 
   
3. Go to the Credits section.
4. Uncheck the applied payment or credit memo.
   
5. Click Save and close.

Moreover, there are three options available to manage a customer credit or overpayment. You can apply the credit to an invoice, issue a refund to the customer, or record the overpayment as a tip.

If you need more help with managing credits, feel free to comment below. I'm here to ensure your success.