We need to resend a customer invoice, with the balance recble as at today, not the balance that was o/s on the date of the invoice. Is this possible?

Yes, it is definitely possible as long as the existing invoice reflects the current balance and a partial payment has been applied to it.

Here is how:

1. Click the All Apps tab on the left navigation panel.
2. Select Sales & Get Paid and go to Invoices.
3. Locate the invoice with the new balance by filtering the Status field to Unpaid and selecting the correct date.
4. Once you find it, click the dropdown icon in the Action column and select Send.
5. Check if the prompt reflects the new invoice balance by scrolling down the details on the right side.
6. Make sure the customer's email is correct and up to date.
7. If you are satisfied, click Send.

Let me know if you have any additional questions.