Historical property rental income - how far to go back?
A new client has had rental income from 2005/06 to date but has never declared any of it to HMRC. Also has unclaimed mileage allowances from 2006/07 to date. What is the first years tax return that needs completing now? If it is pre 2008/09 can the mileage claims still be offset against the tax on the rental income?
Any assistance would be welcome, thanks in advance.