Hello and welcome to the site. Thank you for your question.If you are out of the country for a complete tax year then you are not liable to UK tax for that tax year.
.Please make sure you have completed form P85 when you leave the country. This would enable the Tax Office to get your tax right.More information on form P85 can be found herehttp://www.hmrc.gov.uk/cnr/p85.pdf
I hope this is helpful and answers your question.
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