查某个海关编码（HS）的出口退税率 / Export tax refund rate of one customs (HS) code

查询一个海关编码（HS 编码，8 位或 10 位，可带点或空格）在出口退税率文库中的各个时期，给出退税率和征税率。适用哪一期取决于报关单上的出口日期（不是开票日期）：带上 export_date 就标出那一天适用的一期；不带就按今天（北京时间）标出，回答里的 lookup.in_force_on 写明用的是哪一天。用户问“现在”“今天”时不要填 export_date，绝不要自己猜今天的日期。编码不在文库中时返回 404 和前六位相同的相近编码，绝不编造税率。本站非官方渠道，仅供参考，以官方公布为准。 Looks up ONE customs code (8 or 10 digits; dots and spaces are fine) in the 出口退税率文库 and returns every period the library holds for it, with the refund rate (退税率) and the levy rate (征税率). The rate that applies to a shipment is the one in force on the export date on the customs declaration (报关单出口日期), not the invoice date: pass it as export_date to get the period in force on that date; without it the period in force today (Beijing calendar) is marked, and lookup.in_force_on says which day was used. For “now” or “today” leave export_date out and never guess today’s date. An unknown code answers 404 with nearby codes (first 6 digits equal) and never a made-up rate. Reference data from this site, not the official channel; the official publication prevails.