I have a question or two about UK rental income: 1) We started renting out a property in the UK in Jan 2018. I've read elsewhere that the french tax authorities like us to use the figures from the UK tax assessments, so for the french tax return do I just use the figure from my UK tax 2018 assessment (i.e Jan - 5/4/2018)? I'm concerned because this would only be 3 months whereas if done on an actual basis for the 2018 French tax year it would obviously be 12 months. I have worked it out exactly on a month by nonth basis so have the twelve month figures but am now wondering what I should do. 2) My annual gross rent would normally be more than €15,000 (although the net profit is less than €15,000) so where do I declare this on the french tax form, which form and which boxes?