Each year, you must complete and file a Self Assessment tax return (SA100), detailing your earnings and costs for the previous tax year, so that your Income Tax and National Insurance contributions (NICs) can be calculated on all your taxable earnings. HMRC will then calculate your additional...
Tax breaks can be given for start-ups or true R&D, perhaps on the same principle as JSA/UB is, a contract between govt. and client, if the latter can not prove that they have done (success would not be necessary) what they said they would then the govt. would have to be refunded....