7th September 2021

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• VAT Return 
  Due date for July VAT returns unless exempt

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19th September 2021

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• CIS Return 
  Construction Industry Scheme: monthly return due for period up to 5th of previous month 

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30th September 2021

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• Company accounts filing deadline  
  Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends  

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• Corporation tax return  
  Filing deadline for corporation tax return self -assessment form ct 600 for period ended 30 September 2020 to be submitted to HMRC  

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5th October 2021

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• Income tax and Capital Gains  
  Taxpayers who do not receive a self-assessment tax return to complete must notify HMRC by this date if they had income or capital gains in the previous tax year on which further tax is due.