If you are a non-resident taxpayer that imports more than 10 tonnes of plastic packaging in a year (which means that this packaging is imported into the UK on your own behalf), including plastic packaging that contains more than 30% recycled plastic or is exempt from the tax, you will still need to register and account for any tax due. If you import less than 10 tonnes of plastic packaging in a year, you will still need to keep some records to show this.
If the person on whose behalf plastic packaging is imported into the UK does not account for the tax, including through fulfillment houses, businesses in the supply chain may be found to be secondarily or jointly and severally liable for any unpaid tax.