Business link is a good place to start and I think they offer courses for people starting up as self-employed or starting their own business.
http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1073789950 I'd also look at getting your own accountant, who could provide you with the most accurate advice. Some possibly useful links:
The Association of Accounting Technicians (AAT)
154 Clerkenwell Road, London EC1R 5AD
Tel: 020 7415 7500
www.aat.org.ukFinancial Services Skills Council
51 Gresham Street, London EC2V 7HQ
Tel: 0845 257 3772
www.fssc.org.ukHM Revenue & Customs (HMRC)
See website for departmental contact information.
www.hmrc.gov.ukInstitute of Chartered Accountants in England and Wales (ICAEW)
Chartered Accountants Hall, PO Box 433, London EC2P 2BJ
Tel: 020 7920 8100
www.icaew.co.ukInstitute of Chartered Accountants in Ireland (ICAI)
CA House, 83 Pembroke Road, Dublin 4
Tel: +3531 637 7200
www.icai.ieInstitute of Chartered Accountants of Scotland (ICAS)
CA House, 21 Haymarket Yards, Edinburgh EH12 5BH
Tel: 0131 347 0100
www.icas.org.ukHope that helps!