Hello, my first visit here. English not so good.

To the point: if I run an e-commerce website in Spain which is operated under a Spanish-based company, is there any tax regulation that I should adhere?

I am from Indonesia. Here, there's currently no specific tax regulation for e-commerce, but it's about being regulated. The government is said preparing it since the huge growth of this kind of business. I'm running e-commerce business and thinking to expand it to European countries.