Businesses can usually file a tax return with the government which may require tax number from their purchases. Upon ordering with Shopper+, you'll have these numbers on your invoice as shown below.
Our tax numbers are:
GST for all provinces: GST:#805346863RT0001
BC province: PST#1012-3902
MB province: RST# 100181-7
SK province: PST# 2583821
QC province: QST# 1216646157TQ0001