This is a VERY BAD product, and support absolutely NULL.
Avoid it, do not waste time and money.

First and last time I order something to this "company".
After claim by email, they request that I pay more money to amend THEIR bugs, absolutely unacceptable, they are not a serious company but they cheat with this "product".

We have buy the CCVAOM module and work perfect to print invoices, with righ calculations and IVA.