Tax Return Time To Pay threshold increase In October, HMRC increased the threshold of self assessment liabilities from £10,000 to £30,000 for individuals setting up Time to Pay arrangements. The SEISS 3rd Grant Deadline Is Fast Approaching The deadline to claim the third Self Employment Income Support Scheme grant is Friday 29 January 2021. Changes To Late Filing Penalty For 2019-20 Self Assessment Returns HMRC have today announced that Self-Assessment customers will not receive an automatic penalty for filing their 2019-20 tax return late, provided it’s filed online by 28 February 2021.