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11:45pm on 5 April 2018 to 2am on 6 April 2018
Due to scheduled maintenance for the new tax year you will be unable to file your tax return for tax years 2013 to 2014 and 2016 to 2017 using the HMRC Self Assessment online service between 11:45pm on 5 April 2018 to 2am on 6 April 2018 (other Self Assessment online services are not affected).
You will then be able to file tax returns for tax year 2017 to 2018. We apologise for any inconvenience.
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