Hi Armando,
	
	Currently the Variant Required field.is not one of the available fields in the product import spec.  Here is a link to the product import spec with a sample xls for your reference:
	http://www.smith-consulting.com/Forum...
	As an alternative, if you want to update all your variants as required after you import them in the cart you can issue the following SQL statement in SSMS:
	update smith_productvariants set variantrequired=1
	We can add the Variant Required field to the import spec if you would like it should be pretty easy to program, let me know and I can provide you a quote it should only take a day to add it.
	
	Thanks