Knowledge Base - TaxCalc

	TaxCalc Release Notes 2026 Below are the Release Notes for TaxCalc 2026 releases. Click to see the Release Notes for 2013-2019 > 2020-2024 > 2025 Please note we phase...
	27 Mar, 2026 Views: 208503

	How do I increase/decrease my payments on account towards the following tax year? You can't increase payments on account towards the following tax year – you can only reduce them. You can choose to pay more on account, but HMRC...
	27 Mar, 2026 Views: 24806

	How much tax will I need to pay in January? The information you provide within the SA302 calculation will determine how much tax is due. This calculation will then apply any tax already...
	26 Mar, 2026 Views: 3223

	How do I complete the CT600 for a long period of accounts? (Business users) If your accounts cover a period of more than 12 months, you'll need to complete the CT600 for two periods, as follows: Prepare the accounts for...
	26 Mar, 2026 Views: 9915

	How do I switch to a summary breakdown of expenses on my SA800 partnership return? You can only switch to a summary breakdown of expenses in your SA800 partnership return if turnover is below the threshold for declaring income on...
	26 Mar, 2026 Views: 994

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	TaxCalc Release Notes 2026 Below are the Release Notes for TaxCalc 2026 releases. Click to see the Release Notes for 2013-2019 > 2020-2024 > 2025 Please note we phase...
	27 Mar, 2026 Views: 208503

	What is a 1046 authentication error? When you receive a 1046 error message in TaxCalc (as shown above) after attempting to file tax return, it will be due to one of the following: ...
	13 May, 2025 Views: 139978

	Update to refunds made by HMRC On 1st April 2015, HMRC updated their system to change the way they allocate repayments of overpaid tax. HMRC will only process the refund using...
	14 Feb, 2023 Views: 112241

	Useful HMRC links and contact numbers Personal Tax How to pay HMRC – Different ways to pay your Income Tax or Capital Gains Tax Online Services Helpdesk – Help signing up for...
	28 Jun, 2017 Views: 107833

	How do I download TaxCalc? To download and install TaxCalc on a new computer, or update it on a computer that already uses TaxCalc, we recommend viewing our video tutorial...
	25 Oct, 2022 Views: 93652

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