Why is there tax and duty on my belongings? | Baggage FAQS
If your item has a date of manufacture and is less than six months old, the law states tax and duty must be paid on it.
The date of manufacture can often be read on the plate on the back of the TV or similar item which also has the Product Code. If your shipment is mostly clothing and they are not being shipped in their shop wrapping then they will usually go through without issue.