From the left panel menu, select the Settings tab near the bottom:

Next, under the SETTINGS in-panel menu, select Carriers:

To add a carrier, click Add Carrier: 

From the EIZ Select Carrier menu, select TNT:

Finally, to link your current TNT account, enter your credentials including: API Username, API Password, API Sender Code, API Paying Account, Consignment Prefix, and click Next. It is as easy as that! If you get stuck, check out the link “Where do I find my API details?” or contact us at EIZ to assist you through the process.