sarah hiley

Hello. Have lived abroad since 2007. Unsure if i completed a P85 at the time. I jointly rent out my UK property jointly with my civil partner. We have never put in a self-assessment tax return for this (as thought we'd covered off by declaring on our Australian tax returns). Each year the income (when split evenly between joint owners) has been under £2,500 each. do we need to complete self assessments? and if so, how do we backdate?