Hello my name is ***** ***** I will help you.
To be clear they are shipped from Japan to the UK?
Ok - the customer may be liable for VAT and import duty depending on how much the order (plus postage) is.
Therefore if the products are subject to VAT and import duty the customer may have to pay that, with a surcharge depending on the carrier.
In terms of your tax, you would need to declare it as income and may have to pay tax if its above the thresholds:
Personal AllowanceUp to £11,000 - 0%
Basic rate£11,001 to £43,000 - 20%
Higher rate£43,001 to £150,000 - 40%
Can I clarify anything for you about this today please?
Duty is not charged if the value, i.e. the value of the goods excluding shipping and insurance cost, does not exceed £135. VAT is not charged if the value does not exceed £15.
Does that clarify?