No major changes are expected for your declarations of 2020 income this April to June 8 April 2021 Online French income declarations open this afternoon at impots.gouv.fr If you are a French resident or a non-resident with declarable French income such as French rental income, you are asked to declare online this year unless you do not have internet access at home or cannot do so for reasons such as advanced age or disability. Those making their first declaration may also do so on paper if they have not requested a tax number which is needed to declare online.