There are some interesting statistics on business fears:
This infographic was produced by Sage UK
The results show that half of all small businesses worry about tax-deductible expenses, and making mistakes with their tax.
Rather than spend time on this, it is something that should be referred to a professional instead – that will free up time to spend on your business.
…and you could even find that the cost of getting professional help is covered by the potential tax savings ; and professional fees are also an allowable business expenses for the self-employed too.