Excise Invoice and EHP5 testing

Hi All,

We are cancelling the excise invoice through the T-code J1IH, i want to ask whether is it a legally authenticated to cancel the excise invoice and generating the new number to store the canceled values for that invoice?

i also want to ask, we have implemented EHP5 system and i am doing testing for the same, i want to check / compare the configuration settings between EHP5 and ECC6.0 for SAP SD  is there any procedure or T-code through which my testing will be faster and i can able to know the new fields introduced in the modern version.

Thanks

Ashwini