Self Assessment – Key Dates

31 January 2021 – First payment on account due for 2020/21 tax year.

31 July 2021 – Second payment on account for 2020/21 tax year.

5 October 2021 – Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2020/21 tax year.

31 October 2021 – Deadline for submission of 2020/21 non-electronic returns.

30 December 2021 – Deadline for submission of 2020/21 electronic tax returns if ‘coding out’ of any underpayment is required.

31 January 2022 – Deadline for filing electronic tax returns for 2020/21. Balancing payment due for 2020/21 tax year. First payment on account due for 2021/22 tax year.

31 January 2020 – First payment on account due for 2019/20 tax year.

31 July 2020 – Second payment on account for 2019/20 tax year.

5 October 2020 – Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2019/20 tax year.

31 October 2020 – Deadline for submission of 2019/20 non-electronic returns.

30 December 2020 – Deadline for submission of 2019/20 electronic tax returns if ‘coding out’ of any underpayment is required.

31 January 2021 – Deadline for filing electronic tax returns for 2019/20. Balancing payment due for 2019/20 tax year. First payment on account due for 2020/21 tax year.

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