Is there a complete list of everything you can claim as expenses, including percentages and whether you can reclaim vAT?

Is there a clear list of everything you can claim as expenses:
– the percentage you can claim as expenses
– and for how much vAT you can reclaim…

(and therefore tick ‘Include in quarterly vAT return’ in Dexxter)

I can only find bits and pieces of information here and there in Dexter and online… but nowhere is there a complete list.