问题： 目前含税订单的详情页面已经展示计税原因了，买家侧只需登陆All orders-View more-Payment terms-Tax，鼠标移动到问号的界面，会展示该订单的计税原因。
目前会展示的原因有：
1、因为买家未填写免税资质而收税
You have not provided your tax information. According to relevant laws and regulations, Alibaba.com has the obligation to calculate, collect, and remit sales tax on this order. If you are a registered business buyer, you can submit tax information to be verified for tax exemption. Submit now
2、买家有免税资质，但验真不通过而收税
Your tax information has not been verified yet. You can check the progress or update your information. Visit link
3、其他原因而收税
Your tax information has either expired or is not valid for the product category of this order. You can check and update your information. Update now
注：如果是税号填写且验证通过是在下单且支付后，若订单满足条件后会退税，则Tax金额会显示为0，并且会有文案提示若满足XXX条件，订单会进行退税。