Self Assessment Tax Return Deadline 2018 November 22, 2018 We are only 2 months away from January, and the self assessment tax return deadline for filing online. Please contact me if you require any accountancy or tax help, for a competitive quote Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigation Making Tax DigitalBAS becomes Xero Bronze Partner!!