IRIS Important Known Issues
It is important to us that we resolve any problems that are found in the IRIS Accountancy Suite.
If your problem is listed below, we are working hard to resolve these as quickly as possible.
Issues that have been fixed or are due to be fixed in the next release, are identified as such.
For information on the next release dates, click here.
Issues resolved in the Spring service pack 2 (v25.1.4)
Accelerated transition profit field is incorrectly automatically completed after the bring forward
In 2025 after doing the bring forward on the Transitional Profits screen the Accelerated transition profit field is incorrectly automatically completed. This affects both sole traders and partnerships.
Farmers averaging not correctly calculating for tax year 2025
IRIS Personal tax isn’t running the farmers averaging calculation when prompted for sole trades and partnerships for tax years 2025 and onwards.
Self-Employment has a change of account period in 2025, and return is rejected with error 6492
Where Sole Trade for 2025 has a change of accounting period, resulting in two account periods ending in 2025. The internet return was being rejected with error 6492.
Offset boxes for loss brought forwards are not saving the values for Tax Year 2025
Self-employment in 2025, has a profit in the year and a loss brought forward.
The override boxes weren’t retaining the tick and any manually entered values within the offset against transitional profit or against transitional profit were not saved.
PT Smart Tax in 2025 year: shows 2024 data instead of triggering unsupported entries
Smart Tax Triggers Unsupported Data warning for Tax Year 2025 and throws 2024 vales for Tax Year 2025.
Issue resolved in the Spring service pack 1 (v25.1.3.33)
IRIS Personal Tax
Sole trade profit Tax comp incorrect and generates 6492 for 2025
For the period of 31/03/2025 with sole trade income/profit of £29862, Trade comp shows correct profit of £29862 using 360/365 days and the SA100 tax return SEF page 4 box 73/78 shows correct £29862. The tax comp now shows the correct profit.
IRIS crashes when attempting to create paper checklist
For tax year 2025, the software crashed when attempting to create a paper checklist for current clients and all clients.
Missing CIS entry in box 81 and HMRC TCG doesn’t match Personal Tax calculations
Error 3001 6492 was generated and the CIS entry for the sole trade was not showing on box 81 SEF5
IRIS Business Tax
CT600A -PDF population incorrect causing Internet error – Cannot be 0.00
Where there were Directors loans brought forward, Part 1 of CT600A Supplementary pages were being completed with 0. This was impacting total loans and tax chargeable in this section to also be 0.00.
BTAX – Partnership – Error Code 6605 The amount in Box 3.22 must equal the sum of 3.13A, 3.14, 3.14A, 3.16, 3.16A, 3.18, 3.18A, 3.18B and 3.20
Any allowances or balancing charges claimed in respect of the Main and Special rate pools were not being displayed in boxes 3.14A resulting in a 6605 Error code.
Self-Employment pages are not appearing when claiming the trading allowance on box 16
When a user has a self-employment client; the profit appears on the trade computation and the tax computation. The self-employment pages were not appearing when producing the tax return.
Transition profit is being added to farmer’s averaging against the 2024 profit column
In the 2024 tax year, the transition profit was being added to the profit column in the ‘Adjustment for farmers’ or creative averaging’ screen.
Tonnage tax
Qualifying ship entry does did not save within Computation of Tonnage Tax profits after deleting previous record.
Assets moved to Special Rate Pool
In Business Tax Capital Allowances, when an existing asset was re-opened IRIS automatically assigns it to the special rate pool, even if it was originally entered into the general rate pool.
Transitional loss disappears with using farmers averaging for Tax Year 2024
Box 21 is not being populated when a negative farmers averaging adjustment creates a loss.
Issues resolved in the Spring release (v25.1.0.734)
IRIS Personal Tax
Transitional profits aren’t being calculated where the accounting period has been extended to 31/03 – 05/04
When there was a 5th April year end 2024, the period was not liable for any Transition Profits.
However, we were aware that there were some instances where the current year end had been extended to a long period that ended 31st March-5th April 2024, and then the transition profits weren’t calculated.
IRIS Business Tax
HMRC Filing Error
An HMRC filing error displayed for a user that tried to file a return when a RDEC claim with Box 657 is ticked.
IRIS Docs
An issue had been reported that the digital signed certificates were not populating on any documents that had been approved in OpenSpace (since 25th April).
Outstanding issues
IRIS Accountancy Suite ‘crashing’ in certain windows
When accessing certain windows in IRIS you may experience a crash. This is most notable in Personal Tax when accessing the UK Land and Property page. It also occurs when accessing the WIP tab in the Business Client Maintenance screen.
This is due to an older version of Microsoft C++ 2015-2022 (x86) on your system.
To resolve, please update the program using the latest version from Microsoft which you can find here.
IRIS Business Tax
CT600P-Creative Industries
A new supplementary page has been added for the CT600P-Creative Industries to provide more details on where a company is part of creative and audio-visual industries on the expenditure and audio and visual expenditure credits to calculate the corporation tax charge.
Due to a late change from HMRC, the submission of the CT600P will be postponed to April 2026.
For further information please click here.
Currently a submission for Creative Tax credits cannot be made. An update will be available in the next release, to allow for creative tax credit submission for April 2025.
