From missed deadlines to overstated expenses and surprise payments on account, these are the Self Assessment errors that cost UK taxpayers money — and how to avoid each one.

Choosing between sole trader and limited company affects your tax, liability and paperwork. A practical guide to registering, deadlines and picking the right structure.

Heat pumps cost more upfront but can edge ahead on running costs in the right home. Here's how grants, insulation and tariffs decide the winner.