HMRC have announced a further extension to payment of tax due from Self Assessment customers. Normally tax is due by 31st January however this was extended to 28th February in light of COVID. HMRC have now extended this further to 1st April 2021. If you pay the tax or make a Time to Pay arrangement by 1 April you will not be charged the standard 5% penalty. However, any tax due and unpaid by 31st January will still incur interest charges.