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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...
rating 08 Sep, 2026 Views: 11408
How is Top Slicing Relief calculated after the Finance Bill 2020 changes?
What is Top Slicing Relief? Top Slicing Relief (TSR) hypothetically spreads a chargeable event gain (CEG), such as a gain on a life policy, over...
rating 08 Sep, 2026 Views: 6799
MTD Individual Tax Returns - what will be available to enter for 2025/26
Phased releases of MTD Tax Returns We're rolling out our MTD Tax Return Production software in phases. This article explains what's included in this...
rating 27 Aug, 2026 Views: 168
MTD Individual Tax Return - guide for completing self-employment sections
Completing your Self-Employment pages A guide to the Income, Expenses, Capital allowances, Losses and National Insurance screens This article...
rating 27 Aug, 2026 Views: 128
MTD Individual Tax Return - how does the process work as compared to the SA100?
The MTD tax return, as opposed to the SA100, is required to be completed for individuals who have registered for MTD for income tax for the tax...
rating 27 Aug, 2026 Views: 225


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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...
rating 21 Aug, 2026 Views: 227510
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: ...
rating 13 May, 2025 Views: 147007
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...
rating 14 Feb, 2023 Views: 116153
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...
rating 28 Jun, 2017 Views: 111951
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...
rating 25 Oct, 2022 Views: 104801


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