This functionality is only available in Linnworks.net.
However, you can still print labels from Linnworks desktop application and 2D barcode will appear in Tracking Number field in order details. All you need to do it the following:
1. Integrate Royal mail in Linnworks.net: http://www.linnworks.com/support/shipping-management/courier-integrations/royal-mail/royal-mail-oba-shipping-integration/add-new
2. Add service that you want to use: http://www.linnworks.com/support/shipping-management/courier-integrations/royal-mail/royal-mail-oba-shipping-integration/edit-services
If same service name is assigned to desktop integration, then please make sure that you name it differently.
3. Assign new services to your orders and print order from Linnworks desktop application.
4. All you need to do from linnworks.net is file manifest in the end of the day.
Please note that 2D barcode will only be generated for untracked services. For tracked service Linnworks will still generate a tracking number.
Is there any update as to when Linnworks desktop will start filling 2D barcodes in the tracking number field for standard parcels? Support tells me this is already enabled on Linnworks.net but we have no plans to move to .net and especially in the run up to Christmas, this is a must for most sellers. Entering these numbers manually is a pain and I have already tracked parcels through our account manager to counter INR claims. We need this feature asap!