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| Date | What’s Due |
| 01/07 | Corporation tax payment for year to 30/9/17 (unless quarterly instalments apply) |
| 05/07 | Deadline for agents and tenants to submit returns of rent paid to non-resident landlords and tax deducted for 2017/18 |
| 06/07 | Deadline for forms P11D and P11D(b) for 2017/18 tax year |
| 19/07 | PAYE & NIC deductions, and CIS return and tax, for month to 5/7/18 (due 22/07 if you pay electronically) |
| 31/07 | 50% payment on account of 2018/19 tax liability due |
| 06/07 | Deadline for forms P11D and P11D(b) for 2017/18 tax year |
| 01/08 | Corporation tax for year to 31/10/17 (unless pay quarterly) |
| 19/08 | PAYE & NIC deductions, and CIS return and tax, for month to 5/8/18 (due 22/08 if you pay electronically) |