ltd company + self-employment

Hello I have a ltd company (am sole employee and Director) which I have been paying myself from monthly (using basic PAYE tools). This income from my ltd company is my only income. I have received a notice to file self-assessment, and when going through it preliminarily, I see it I'm being taxed my on the income I've paid myself over the year PLUS the turnover of the ltd company. What have I done wrong? And how best to resolve? Thank you very much for your advise.

Hi,
Unfortunately, it is not possible to review personal matters in this forum. For individualised assistance please contact our Self Assessment team for advice:    
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Thank you.

Hi, not a HMRC admin but if you only work via a company then you are not self employed and should not be including the income of the ltd company on your personal return. Income of the company is recorded on a corporation tax return.