Sage 50 Canada

What is the difference in Sage between Voiding a Payment (from the Payment menu) and reversing the transaction with a GL entry? For example, I wrote a damage deposit cheque to cover a contractual obligation and charged it against an expense GL; in fact…

I couldn't find any answer related to this issue, so I have to post it by myself. I entered an invoice with zero amount by mistake, now I want to delete or modify it but the system won't allow me to do so. I need to delete it because I need to use that…