1 September 2020
Payment of corporation tax liabilities for periods ended 30 November 2019 if not liable to pay by instalments.
Check HMRC website for changes to car mileage fuel rates.
7 September 2020
Due date for VAT return and payment for 31 July 2020 quarter (electronic payment).
14 September 2020
Quarterly corporation tax instalment payment for large companies.
Monthly EC sales list if paper return used.
19 September 2020
PAYE/National Insurance/student loan/construction industry scheme payments for month ended 5 September 2020 if by cheque.
File monthly construction industry scheme return.
21 September 2020
File online monthly EC sales list.
Intrastat – submit supplementary declarations for August 2020.
22 September 2020
PAYE/National Insurance/student loan/construction industry scheme payments for month ended 5 September 2020 if paid online.
30 September 2020
Companies House should have received accounts of private companies with 31 December 2019 year end.
Companies House should have received accounts of public limited companies with 31 March 2020 year end.
HMRC should have received corporation tax self-assessment returns for companies having an accounting period ended 30 September 2019.
End of CT61 quarterly return period.
Business rates – small business relief claims for 2019-20 should be made to local authority by today.
Businesses to reclaim EC VAT chargeable in 2019.
Report the disguised remuneration loan charge.
Companies with a 30 June 2020 period end must notify HMRC if they have profits within the scope of the diverted profit tax unless none would arise.