# Deadlio > Client deadline tracker for UK accountants ## Posts - [The AML monitoring visit that found reviews years out of date](https://deadlio.com/aml-review-supervisor-visit-scenario/): An illustrative scenario: a practice's AML supervisor visits, samples client files, and finds customer due diligence that was done once at engagement and never refreshed. - [A landlord's first MTD quarter: the update that was never sent](https://deadlio.com/mtd-first-quarter-landlord-scenario/): An illustrative scenario: a landlord with rental income over £50,000 joins Making Tax Digital for Income Tax in April 2026, and the first quarterly update due in August is missed because nobody was tracking quarters. - [The confirmation statement that led to a strike-off warning](https://deadlio.com/confirmation-statement-strike-off-scenario/): An illustrative scenario: a dormant holding company's confirmation statement goes unfiled, a director's identity is not verified in time, and the first strike-off notice arrives in the Gazette. - [When a team member leaves, their VAT clients' quarters go quiet](https://deadlio.com/staff-leaver-vat-penalty-scenario/): An illustrative scenario: a bookkeeper hands in her notice, her VAT clients are never formally reassigned, and two late returns push a client to the penalty points threshold. - [The year-end change nobody diarised](https://deadlio.com/changed-year-end-scenario/): An illustrative scenario: a client's director shortens the accounting period online without telling the practice. The accounts deadline moves forward, the Corporation Tax payment is missed, and interest starts to run. - [The £375 surprise: how a new company's first accounts slipped through](https://deadlio.com/first-accounts-missed-deadline-scenario/): An illustrative scenario: a newly incorporated client, a first accounting period of more than 12 months, and a deadline nobody had diarised. What went wrong, what it cost, and how a single register would have caught it. - [AML client reviews: how often accountants should refresh customer due diligence](https://deadlio.com/aml-client-review-cycle/): What the Money Laundering Regulations require on ongoing monitoring, how to set a risk-based review cycle for each client, the triggers that mean a review is due early, and how to evidence it for your supervisor. - [Auto-enrolment re-enrolment and re-declaration of compliance: the three-year deadline](https://deadlio.com/auto-enrolment-re-declaration/): Why every employer must re-enrol staff and re-declare to The Pensions Regulator every three years, how the re-enrolment date and the 5-month declaration deadline work, and the penalties for missing it. - [Charity Commission annual return deadline: what charities must file and when](https://deadlio.com/charity-commission-annual-return/): The 10-month deadline for charity annual returns, accounts and trustees' reports, the income thresholds that decide what is filed, and how charitable companies have two sets of deadlines. - [Making Tax Digital for Income Tax: quarterly update deadlines for sole traders and landlords](https://deadlio.com/mtd-income-tax-quarterly-updates/): Who is in MTD for Income Tax from April 2026, the standard and calendar quarter dates, when each quarterly update is due, and how practices can keep on top of four extra deadlines per client. - [VAT return deadlines: one month and seven days, and the points-based penalties](https://deadlio.com/vat-return-deadlines/): When quarterly and monthly VAT returns and payments are due, how the points-based late submission penalties work, the late payment charges, and how to stop a quarter slipping through. - [Self Assessment deadlines: returns, payments on account and penalties](https://deadlio.com/self-assessment-deadlines/): Every Self Assessment date a practice needs – registration, paper and online returns, balancing payments and payments on account – plus the penalty regime and January planning tips. - [CT600 return filing deadline and late filing penalties](https://deadlio.com/ct600-filing-deadline/): The 12-month CT600 deadline, how it differs from the payment date, the escalating penalties for late returns, and the pitfalls with long first accounting periods. - [Corporation Tax payment deadline: 9 months and 1 day explained](https://deadlio.com/corporation-tax-payment-deadline/): When Corporation Tax must be paid, why the payment is due before the return, how quarterly instalments work for large companies, and what late payment costs. - [Confirmation statement deadline: when it is due and how to stay compliant](https://deadlio.com/confirmation-statement-deadline/): The 12-month review period, the 14-day filing window, what happens if a confirmation statement is late, and how identity verification for directors now ties in. - [Annual accounts filing deadline at Companies House: a practical guide for UK accountants](https://deadlio.com/annual-accounts-filing-deadline/): How the Companies House accounts deadline is worked out for first and subsequent periods, what happens when a year end changes, the late filing penalties, and how to keep every client on track. ## Pages - [Practice scenarios](https://deadlio.com/practice-scenarios/): Illustrative stories of missed deadlines in accountancy practices, and how to prevent them. - [Contact Deadlio](https://deadlio.com/contact/): Questions about Deadlio, plans or Enterprise? Email hello@deadlio.com or send us a message. - [Deadline guides for UK accountants](https://deadlio.com/deadline-guides/): Plain-English guides to every compliance deadline an accountancy practice tracks – Companies House, Corporation Tax, Self Assessment, VAT, MTD, charities, pensions and AML. - [Deadlio](https://deadlio.com/): Deadlio is the client deadline tracker for UK accountants. - [Privacy policy](https://deadlio.com/privacy-policy/): Deadlio is a product of MGT Fintec Synergies Ltd, a company registered in England and Wales (company number 10628094), registered office C/O Cloud Business Hub, 23 Sangley Road, London SE25 6QT. [comment]: # (Generated by Hostinger Tools Plugin)