One option if your item is expensive enough is a mail forwarding service based out of somewhere like Oregon (no sales tax)... FP 30 day return window means you can get it shipped there, processed and sent to you via priority mail/ups/fedex, and still make the return window in case the item doesn’t work out. FP has to charge sales tax anywhere there is a Neiman Marcus, so $45 in shipping/insurance/processing beats $450 in sales tax! If you ever get IRS audited just know you may be liable for use tax so this is not a risk free route.