Complex sentence: The term "missing trader" refers to the fact that the trader goes missing with the VAT, "carousel" refers to a more complex type of fraud in which VAT and goods passed around companies and jurisdictions, similar to how a carousel travels round.
Split into simpler sentences: The term "missing trader" refers to the fact that the trader goes missing with the VAT. "Carousel" refers to a more complex type of fraud in which VAT and goods passed around companies and jurisdictions, similar to how a carousel travels round.