• Can I use my own carrier rates?
• What rate discounts are available through my ShipStation account?
• Does ShipStation automatically select the cheapest shipping option?
• Why are my UPS or other carrier rates different in ShipStation?
• How do I start using UPS from ShipStation?
• Why don't my postage charges match what my customers are paying for shipping?
• What Are The USPS Holiday Surcharges?