I'm not familiar with TASCO Scopes other than I recognize the name brand. As is the case with many things made in China, one factory turns out scopes (or HDTVs, binoculars, microwave ovens, etc) that end up with any number of names on them.
I have a Barska 3-12x52 scope, made in China, very inexpensive that performs very well with very clear optics.
I bought a Nikon pair of binoculars that said Japan, but if one looked closer said Made in China. Fine, bright binos for a reasonable price.
While I wish they were all made here, we couldn't afford them if they were.