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If you have started a limited company you need to notify HMRC that you have started a company and they will issue you a tax reference number for your company. All you need to do is call HMRC office and they will do the rest.
In addition as an individual you may be paying yourself a salary or dividends etc - therefore you will need to register for tax with HMRC as well.
You have to complete a return for each year as your taxes may not be deducted through PAYE. With regards XXXXX XXXXX company affairs you need to complete a tax return even if you make a loss or if it's first final year of trading.
Hope this helps. Go get started simply call this number and register for tax: 0300(NNN) NNN-NNNN/p>
Thank you very much for the information, much appreciated.