Quote Originally Posted by dbltoe View Post
What is your setting for "Retail Pricing or Online Pricing?"?

You should probably have it set for Online if using ShipStation.

Of course, tare weights set elsewhere can affect the quote as well.
I have played with both settings. Neither is correct.

I will re-iterate again though, this has nothing to do with Shipstation, Shipworks, PirateShip, Shippo, or any other shipping tool.

It has to do with the rates being returned from USPS via the API being incorrect for the account number / meter number. I have played with weights and dimensions and everything else to no avail.

Although my understanding of the Zen-Cart module is not strong, I have contacts in USPS that might be able to connect me with their dev. team to try and troubleshoot.