Your HMRC paper tax return must be submitted by 31 October.
If even you don’t have any tax to pay, there will be penalties, if you send the form after this date. You can fill in your tax return and submit before 31 October, without waiting for the deadline.
You can request a paper for here and get in touch with us asap if you need help.
More information about Self Assessment and penalties can be found on the HMRC site.