If you have your own business, don't you have your own accountant?
In general, you should aim for a Chartered or Certified firm of Accountants and there is no real requirement for aviation knowledge as the rules on reclaiming VAT for training are the same across all business sectors.
They will need to know the following:-
Is your business VAT registered?
Does it provide the training itself? And is that flying training of the sort you wish to undertake?
Does you business provide staff on an agency basis?
Is your business a limited company?
Do you pay yourself PAYE, dividends or drawings?
However, from little you've said, I agree with MIKECR in that as an airline employee, you would not be able to reclaim the VAT.
Cheers
Whirls