HMRC urges customers to file as soon as possible.

Taxpayers must report capital gains from cryptoassets.

Current approach could conflict with tax simplification aims.

Self-assessment payments via the app hit £121 million.

Online calculator instantly reveals annual income tax bill reduction.

HMRC warns customers to be cautious.

HMRC rates will reimburse employees for business travel.

Former Formula One boss pays £650m in tax and penalties.

Policy could lead to UK’s biggest tax rise in 50 years.