What has changed

Added device-specific spreadsheet import checks for MTD Companion and free-versus-paid selection notes for Clear Books and Sage. Flagged the MTD Companion VAT scope conflict, clarified platform labels, added guide section links and a checker link that never includes entered figures. Source

Added the confirmed corrections email to About and the corrections section. Guide error-report links now go directly to the contact section. Independent tax review remains pending. Source

Added source-linked guides for landlords, Income Tax registration and qualifying income before expenses. Topics came from UK English search research; tax explanations were checked against HMRC guidance. Each guide connects to the checker, software filters and relevant existing answers. Source

Expanded the free-software guide with income-type filters, whole-year cost checks and the distinction between free plans, bank-account offers and partial-year trials. Product claims retain their own source and check date. Source

Added a 100PcMTD price and feature page after checking Comsci and HMRC. The first-three-quarters offer is separate from paid Income Tax subscriptions; unfinished annual-return features are highlighted. Source

Added a direct explanation of the 5 April Income Tax year end, distinguishing it from 31 March calendar update periods, 7 May quarterly filing and the following January tax-return deadline. Source

Added a source-linked checklist for a missing submit button or update period. The questions directory now finds this help when searching for submit button; the checklist does not diagnose a fault in any particular product. Source

Added source-linked answers on spreadsheets, receipts, PAYE income, digital exclusion and software connection problems, plus a preparation checklist. Community discussions identify the questions; official guidance supports the answers. Source

The checker now rejects malformed amounts and incomplete income types, preserves pennies near thresholds and warns when earlier years are missing. Figures are no longer written into shareable URLs. Source

Added live source-body comparison without overwriting reviewed snapshots. Removed placeholder contact details and blanket accuracy claims; independent tax review remains pending. Source

Every price reread directly on the vendor's page; four were wrong in our first version and are corrected. Each price now shows the vendor's own words. Source

Added the penalty rules in full, the last tax return sent the old way, part-year income in the checker, and answers to eight questions people ask in forums. Source

Software list refreshed from HMRC's finder: 163 recognised products. Prices checked on 15 product pages. Source

GOV.UK updated its guidance on sending quarterly updates. No penalty points for late quarterly updates in the 2026 to 2027 tax year. Source

GOV.UK updated its sign-up guidance for Making Tax Digital for Income Tax. Source

GOV.UK updated how to work out qualifying income, including ceased income sources and joint property. Source

GOV.UK updated how to apply for an exemption, including when to apply if you start in April 2028. Source

HMRC moved software still in development into its software finder tool. Source