Target has been making some big changes to its store’s checkout process. The popular retailer has been cutting operating hours of its self-checkout lines across the country. Select Target stores are now closing self-checkout as early as 6 p.m. The signs around Target stores state that these closures won’t begin until 8 p.m., but that varies depending on your location if self-checkout closes earlier. The move hasn’t gone into effect at all of the company’s stores because staffing and sales volumes play a role in the decision to close self-checkout lanes early. Most of Target’s more than 2,000 n…