First install module "account_cancel"

then open Accounting >> Configuration >> Financial Accounting >> Journal

the select the related journal whom you would to cancel the entries then select the allow cancel entries to true

then now move in the related entries and cancel that entries.

[Odoo10 CE] and [Odoo 10 E]

I think there is a problem while you reconcile and cancel a paid invoice >> becose the Balance of a journal like bank or cash does not move. Pls do a test with a paid invoice (lets say with +$100) to journal bank. Cancel all the journal entries (that works fine) but then you will see that the balance does not move -$100.

I also tested this issue right now on a Odoo.com database. Do you have the same like me?

I did install athe accnount cancel module, I'm logged ad adviser but I so not neet any option in journals, even advanved propoeties, that mention allow cancel entries

Any reason why it remains hidden for me ? tahnks

Seb