Sorry to bump such an old thread but it is a further question on this topic.

When purchasing a ONEx with open dated sectors are only the obligatory taxes included?

If I start to apply dates in the future that means some connections are Transfers rather than Stopovers does this mean I am due to pay more tax or should I get some tax back?
Tx

Edited to add: Don't mind me I think I just found an answer in another recent thread that didn't come up in my search.