IR8 Return due date
If the authority has a 31 March balance date you have until 7 July 2019 to send in the return, unless you’ve been granted an extension of time. If you have a balance date other than 31 March, this date may be different.
If you aren’t sure call Inland Revenue on 0800 377 774 to check.
If the authority is the client of an agent you may have until 31 March 2020 to file the return. Contact your agent for more information.