If a SIMA is flagged or If you want to setup the SIMA code, you will have to check the classifications in the SIMA setup first.

This is where your master SIMA table is maintained.

From the top menu-
Setup >> Shipments >> SIMA

Look for the classification if it's already set. (As shown in below screenshot)

If it's already set, you can set the SIMA code under the CCI details screen (As shown in the last screenshot of this article.)

If it's not set, you will need to add it.

To Add- Click on the Add button given at the bottom of the SIMA List screen beside Remove.

It will open another screen with SIMA Entry with the following details- 

SIMA Info and SIMA Codes.

SIMA Info:

• Name- Enter the name you want to add for your reference, as shown in the screenshot.

• Note- If you want to add any notes(optional).

Duty: You can setup the duty in $ or %

SIMA Codes:

• Countries- Add the country code- input COO (Country of Origin)
• HS Codes- Add the HS code.

Then click on OK to save it.

Once it is saved, you can update it under the CCI Details screen, as shown in the screenshot.