1. Enable the Barcode Module

• Go to the Apps menu.
• Search for and install the Barcode and Product Label modules (if they are not already installed).

2. Assign Barcodes to Products

• Navigate to the Inventory app.
• Go to Products > Products or Product Variants.
• Open the product you want to assign a barcode to.
• In the product details, you will find a Barcode field.
• Enter the Amazon FNSKU (128 type) barcode for that product.

3. Configure Barcode Printing Settings

• Navigate to Inventory > Configuration > Settings.
• Scroll to the Barcode section and ensure the barcode settings are activated.
• Click on Barcode Printing and configure the default barcode format to Code 128.
• Save the settings.

4. Create a Custom Barcode Label (Optional)

• Go to Inventory > Configuration > Product Labels.
• Create a new label format if needed, specifying that the barcode format should be Code 128.
• Customize the label with the information you want (e.g., product name, FNSKU code, etc.).

5. Print Barcodes

• Once the product has the FNSKU barcode assigned, navigate to the Inventory app.
• Select the product or list of products you want to print barcodes for.
• Click on the Action dropdown and select Print Product Labels.
• Odoo will generate a printable label using the barcode type you’ve configured (Code 128 in this case).