Proof of earnings for self employed in Uk

Hi All,

I have got my H1 B approved and have booked a visa interview date with US Embassy in London.I am working in UK for the last 2 years.I work here as self-employed IT engineer doing contracts at client sites.

In order to provide the last 6 month Pay slips, what would be best form of evidence as i dont get a pay slip.My accountant just sends me a copy of how much i take after tax.So will the bank statements from the company and the my personal bank statements be enough or do i need to get a letter from the account.

Your help will be much appreciated.

Thanks