Can you help, I have raised an invoice and when I go to send it it states that it is paid?

Hello, @Darren67.

After creating an invoice, it will only be marked as paid once the invoice payment is recorded via Receive payment. I'm here to help you to revert invoice to unpaid in QuickBooks Online.

I'll show you how:

1. Go to Sales and choose Invoices. 
2. Select the Invoice transaction you want to mark as unpaid. Then, select Edit Invoices button.

3. Click the Payment made hyperlink in the upper right corner.

4. Click for the date you marked it as paid.

5. Click Clear Payment.

6. Select Save and close.

7. A prompt message will appear, click Yes.

In addition, once the customer paid the invoice, refer to this article on how to receive and record invoice payment for you reference. 

Alternatively, changing the look and layout of your sales forms is a simple but effective way to improve your company's communications. Check out this article for your guide: Customise invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to share a comment below if you have more questions. I'll be around to help. Stay safe and well!