Knowledge Base - TaxCalc

	Known issues in the latest released version of TaxCalc Below is a list of notable issues that have been reported in recent versions of TaxCalc since their release. Other issues may exist that have not...
	01 Apr, 2025 Views: 39325

	TaxCalc Release Notes 2025 Below are the Release Notes for TaxCalc 2025 releases. Click to see the Release Notes for 2013-2016 > 2017 > 2018 > 2019 > 2020 >...
	01 Apr, 2025 Views: 180102

	How do I resubmit a return or file an amended return? If, after making a successful submission, you need to make changes and file an amended return. Please see the video tutorial for a walk through of...
	25 Mar, 2025 Views: 69872

	When do I make payments on account? You'll usually have to make two payments on account for the current year's tax: One by 31 January in the current year. One by the following 31...
	25 Mar, 2025 Views: 2038

	Moving TaxCalc to a new computer (Individual, Partnership and Limited Company users) On the Old PC Before starting you should know the location of the data files. Start the TaxCalc program and select a file within an appropriate...
	25 Mar, 2025 Views: 44826

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	TaxCalc Release Notes 2025 Below are the Release Notes for TaxCalc 2025 releases. Click to see the Release Notes for 2013-2016 > 2017 > 2018 > 2019 > 2020 >...
	01 Apr, 2025 Views: 180102

	What is a 1046 authentication error? When you receive a 1046 error message in TaxCalc (as shown above), it means one of the following: HMRC hold different details to what has been...
	26 Oct, 2023 Views: 131648

	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: 105040

	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: 87567

	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: 77874

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