Guess the province & sales taxes from any given postal code (Canada)

findProvinceCA.js

// A very simple example (sales taxes from 2022)

function findProvince(input) {
  // Starting postal code character - https://www150.statcan.gc.ca/n1/pub/92-195-x/2011001/other-autre/pc-cp/tbl/tbl9-eng.htm
  // Provinces short codes - https://www150.statcan.gc.ca/n1/pub/92-195-x/2011001/geo/prov/tbl/tbl8-eng.htm
  // Sales taxes by province - https://www.retailcouncil.org/resources/quick-facts/sales-tax-rates-by-province/

  //var input = "H2V 1V8";
  var postal = input.substring(0, 1).toLowerCase();  // E.g., "H2V 1V8" becomes "h"

  if (postal == "a") {
    var province = "NL";
    var pst = 0;
    var gst = 0.15;
  } else if (postal == "b") {
    var province = "NS";
    var pst = 0;
    var gst = 0.15;
  } else if (postal == "c") {
    var province = "PE";
    var pst = 0;
    var gst = 0.15;
  } else if (postal == "e") {
    var province = "NB";
    var pst = 0;
    var gst = 0.15;
  } else if (postal == "g" || postal == "h" || postal == "j") {
    var province = "QC";
    var pst = 0.09975;
    var gst = 0.05;
  } else if (postal == "k" || postal == "l" || postal == "m" || postal == "n" || postal == "p") {
    var province = "ON";
    var pst = 0;
    var gst = 0.13;
  } else if (postal == "r") {
    var province = "MB";
    var pst = 0.07;
    var gst = 0.05;
  } else if (postal == "s") {
    var province = "SK";
    var pst = 0.06;
    var gst = 0.05;
  } else if (postal == "t") {
    var province = "AB";
    var pst = 0;
    var gst = 0.05;
  } else if (postal == "v") {
    var province = "BC";
    var pst = 0.07;
    var gst = 0.05;
  } else if (postal == "x") {
    var province = "NT/NU";
    var pst = 0;
    var gst = 0.05;
  } else if (postal == "y") {
    var province = "YT";
    var pst = 0;
    var gst = 0.05;
  } else {
    var province = postal;
    var pst = "";
    var gst = "";
  }
  
  return [province, pst, gst];
}