How do I change an invoice payment date from 22 June 2019 to 22 March 2019Kind RegardsMichael Mason

Welcome to the Community, @MASeLtd.

Changing the invoice payment date can be done through the Sales menu. Let me show you how:

1. Go to the Sales menu at the left pane, then select the All Sales tab.
2. Locate the payment and click to open the transaction.

3. Change the Payment date, then hit Save and close.

That should do it. For future reference, consider checking out this article: How to record a customer payment.

Please let me know how it goes or if you need anything else. I'll be happy to help. Have a great weekend.