Knowledge Base Articles

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3035 articles

failed-to-initialize-webview2-couldnt-find-a-compatible-webview2-runtime-installation-to-host-webviews

Failed to initialize WebView2: Couldn’t find a compatible Webview2 Runtime installation to host Webviews.

You may encounter the following error when opening IRIS after installing the latest Service Pack (26.1.10.60); please click OK to continue to the Main menu…

ias25431-trust-tax-2026-expenses-not-showing-incorrect-on-boxes-3-24-3-29-etc

IAS25431 Trust Tax – 2026 Expenses not showing/incorrect on boxes 3.20-3.29 etc (FIXED)

We confirm this is a known defect in version 26.1.0 with certain Trust expense types where the entry is not showing or is incorrect on…

personal-tax-2026-onwards-employment-close-company-dividends

Personal Tax- 2026 onwards Employment Close Company dividends (FIXED)

To indicate a company is close company with dividends (Only if the PT client who you are entering the data for is set as a…

how-do-i-set-up-the-mtd-itsa-job-type-in-iris-practice-management

How do I set up the MTD ITSA job type in IRIS Practice Management?

Problem How do I set up the MTD ITSA job type in IRIS Practice Management and configure it to automatically track quarterly obligations? Resolution From…

p11d-loan-benefit-calculator-using-old-interest-rate-for-25-26-2-25-and-should-be-3-75

P11D- Loan Benefit Calculator using old interest rate for 25/26- 2.25% and should be 3.75% (FIXED)

In the 2026 tax year on version 26.1, the P11D Benefit Calculator is still using the old rate of 2.25 when it should be 3.75.…

personal-tax-mtd-quarters-qa-2026-onwards

Personal Tax – MTD Quarters Q&A 2026 onwards

As MTD is mandatory from 2026 onwards, there are new questions raised and we shall add answers here: Common terms used in Personal Tax: 'Digital…

business-tax-rd-claim-with-additional-information-box-650-657

Business Tax- R&D claim with additional information- Box 650/657

You have ticked the R&D ‘additional information box’ and made a R&D claim (either intensive or RDEC) but when you run the CT600 the boxes…

business-tax-non-trade-capital-allowances-box-290-pg4

Business Tax- Non Trade Capital Allowances (Box 290, Pg4)

How to fill in box 290 on the CT600, please follow these steps:-Business tax-Data entry-Claims for capital allowances-Non trading charges and allowances-Enter the figure in…

iris-accountancy-ap-bt-pt-when-partner-leaves-a-two-partner-partnership

IRIS Accountancy AP/BT/PT – When Partner leaves a Two Partner Partnership?

Any trade which changes from 'Partnership type' to a 'Sole trade type' business as it affects Accounts Production/Business Tax/Personal tax please read below : In…

personal-tax-mtd-quarter-periods-missing-guide

Personal Tax- MTD ‘Quarter periods missing’ guide

The FULL guide to the KB is linked here, as this is a quick checklist to help new users etc. The MTD four quarters do…