Correcting or cancelling a payment

A saved invoice can't be edited — that's a GST requirement. To fix a wrong bill:

1. Open the member → find the payment → Cancel / Reverse, and give a reason.
2. Fitplex marks the invoice reversed, cancels the membership or PT package it created, and issues a credit note (CN-…).
3. Take the payment again with the right amounts.

Reversed invoices and credit notes stay visible (struck through) for your records, but count for nothing in dues or revenue.