https://ac-co.ai/blog Insights on accounting, tax compliance, and business automation from ac-co.ai en-gb Sun, 20 Sep 2026 18:23:48 GMT https://ac-co.ai/blog/hmrc-september-2026-mtd-sign-up https://ac-co.ai/blog/hmrc-september-2026-mtd-sign-up Sun, 06 Sep 2026 00:00:00 GMT HMRC says it will start signing up eligible 2026/27 MTD for Income Tax users from September 2026. Learn what that means and how to get your records ready. MTD Income Tax https://ac-co.ai/blog/mtd-calendar-update-periods-31-march-year-end https://ac-co.ai/blog/mtd-calendar-update-periods-31-march-year-end Sun, 06 Sep 2026 00:00:00 GMT HMRC says businesses with a 1 April to 31 March accounting period must choose calendar update periods before their first MTD for Income Tax quarterly update. MTD Income Tax https://ac-co.ai/blog/mtd-income-source-changes-2026 https://ac-co.ai/blog/mtd-income-source-changes-2026 Sun, 06 Sep 2026 00:00:00 GMT HMRC’s 2026 guidance explains what happens when an MTD for Income Tax user starts or ceases a self-employment or property income source. MTD Income Tax https://ac-co.ai/blog/mtd-income-tax-exemptions-2026 https://ac-co.ai/blog/mtd-income-tax-exemptions-2026 Sun, 06 Sep 2026 00:00:00 GMT Some MTD for Income Tax exemptions are automatic and some need an application. HMRC’s current guidance explains the difference and what remains unchanged. MTD Income Tax https://ac-co.ai/blog/mtd-income-tax-penalties-2026-27 https://ac-co.ai/blog/mtd-income-tax-penalties-2026-27 Sun, 06 Sep 2026 00:00:00 GMT There is no quarterly-update late penalty in the first mandatory MTD for Income Tax year, but records, returns and payment dates still matter. MTD Income Tax https://ac-co.ai/blog/mtd-quarterly-updates-cumulative-2026 https://ac-co.ai/blog/mtd-quarterly-updates-cumulative-2026 Sun, 06 Sep 2026 00:00:00 GMT HMRC clarified in 2026 that each MTD for Income Tax quarterly update covers the tax year to date. Learn how that affects corrections and review routines. MTD Income Tax https://ac-co.ai/blog/mtd-second-quarterly-update-november-2026 https://ac-co.ai/blog/mtd-second-quarterly-update-november-2026 Sun, 06 Sep 2026 00:00:00 GMT The second 2026/27 MTD for Income Tax quarterly update is due by 7 November. Here is what to review, what to send, and what remains for year end. MTD Income Tax https://ac-co.ai/blog/side-hustle-tax-registration-october-2026 https://ac-co.ai/blog/side-hustle-tax-registration-october-2026 Sun, 06 Sep 2026 00:00:00 GMT HMRC’s July 2026 reminder explains when side-hustle income may need reporting, how the £1,000 trading allowance works, and the registration date for new filers. Self Assessment https://ac-co.ai/blog/basis-period-reform-2024-25 https://ac-co.ai/blog/basis-period-reform-2024-25 Thu, 16 Apr 2026 00:00:00 GMT Understand the UK Basis Period Reform starting in the 2024/25 tax year. Ensure you align your accounting dates and stop complex overlap relief calculations. MTD Income Tax https://ac-co.ai/blog/mtd-for-itsa-2026 https://ac-co.ai/blog/mtd-for-itsa-2026 Thu, 16 Apr 2026 00:00:00 GMT MTD for Income Tax Self Assessment (ITSA) becomes mandatory in April 2026. Find out if you meet the £50,000 threshold and how to prepare your business. MTD Income Tax https://ac-co.ai/blog/self-assessment-deadlines-2026 https://ac-co.ai/blog/self-assessment-deadlines-2026 Fri, 20 Mar 2026 00:00:00 GMT All the critical Self Assessment deadlines for the 2025/26 tax year — from registration to payment — plus tips to avoid penalties. Self Assessment https://ac-co.ai/blog/vat-mtd-filing-guide https://ac-co.ai/blog/vat-mtd-filing-guide Sun, 15 Mar 2026 00:00:00 GMT A comprehensive guide to Making Tax Digital for VAT — covering registration, software requirements, filing deadlines, and common pitfalls for accountants. VAT https://ac-co.ai/blog/cato-closure-2026 https://ac-co.ai/blog/cato-closure-2026 Wed, 16 Apr 2025 00:00:00 GMT HMRC's Company Accounts and Tax Online (CATO) service is closing. Learn what this means for your company tax returns and how to easily transition to commercial software. Corporation Tax