| Date | What’s Due |
| 1/12/20 | Corporation tax for year to 28/02/2020 unless quarterly instalments apply |
| 19/12/20 | PAYE & NIC deductions, and CIS return and tax, for month to 5/12/20 (due 22/12 if you pay electronically) |
|
30/12/20 |
Deadline for filing 2019/20 tax return online in order to request that HMRC collect outstanding tax via the 2021/22 PAYE code |
|
1/1/21 |
Corporation tax for year to 31/03/2020 unless quarterly instalments apply |
|
19/1/21 |
PAYE & NIC deductions, and CIS return and tax, for month to 5/1/21 (due 22/1 if you pay electronically) |
|
31/1/21 |
Deadline for filing 2019/20 self-assessment tax return online and paying your outstanding tax for 2019/20 and first payment on account of 2020/21 tax.
Note that if this liability is no more than £30,000 you can agree with HMRC to spread over 12 months |