When viewing a product, for example if I select a different tab like "Ask a question" , the system maintains this tab opened when I go to another product, how I can do to disable this option? We don´t want the system to save the last tab selection. Maybe it´s something about virtuemart caché config, how I could change it?

Sending a catch to further detail the incidence.

Greetings.

There is no functionality for this coded in the templates..

You would have to code up something like setting a cookie to remember the selection - but as I say - this functionality isn't offered
The default tab is simply set with style="display:none;" on the rest.

You can always check what is the native functions by refering to the example site www.flexiblewebdesign.com/virtuemart-2-template-puremart