Welcome to SaleHoo!
No need to exhaust yourself, you can provide Evertek your VAT/IVA ID. The Value-added tax (IVA - Impuesto al Valor Agregado) is a variant of the sales-tax. This tax charges 16% of the price of sale of all kind of merchandise, goods, and services.
Also, when posting on any forum please avoid using all caps as this is like shouting online :)
Whenever you're not sure you an always ask the supplier directly by contacting them or you can ask us anytime. But oftentimes it is best if you contact your supplier directly especially if your question pertains to pricing. Remember: the more items you buy the lower the price goes!
Hope this helps.