Since PK Supplies is Illinois-based, sales tax applies to all purchases. The only exception would be is if you are a reseller with the state of Illinois. If so, you can place your order on-line, as normal, which will automatically calculate the appropriate sales tax. The tax will be refunded after providing your company's signed CRT-61Illinois Certificate of Resale via fax at 224-333-7070. This exemption applies only to shipments sent to the address on the CRT-61 Certificate of Resale.