We want to integrate our Magento 2 store with our courier (Parcelforce) i.e. so we can automatically print shipping labels with the data from Magento admin rather than doing this manually in parcelforce's admin area.
Can anyone recommend a plugin for doing this, or had any experience with setting this up?
By default Magento doesn't allow this type of functionality.
You need to customize from your end or you have to ask for extension developer company from below links, They will provide magento 1 integration for parcelforce shipping.