Tax return deadline is 31 October. by sgtaxcom | Sep 23, 2017 | Taxation | 0 commentsIf you are a self lodger, your 2018 income tax return must be lodged by 31 October 2018. However, you may eligible for an extension till 15 May 2019 if you are using a registered tax agent. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website Δ