Self-Assessment Deadline 31 January 2026 (UK): What to File, What to Pay, and How to Avoid Penalties
Introduction: In the UK, tax does not work on guesswork or flexibility. It works on dates. Once those dates pass, problems tend to follow very quickly. One of the most important of those dates is the self assessment deadline, which affects far more people than many realize. Anyone who earns money outside a standard PAYE job, whether […]
