If you are paying more tax than your competitors you are at a disadvantage and are unable to provide the same services efficiently. The first issue to address is your business structure, is it helping or hindering your tax situation. Some structures allow greater mitigation than others and you need to be aware of the issues.
When starting a business the basic sole trader is the low cost option, it provides simplistic. However with Sole Traders and also Partnerships there is little tax planning and ability of the stakeholder to control what is paid in taxes.
Another common business tax vehicle would be a closed company. Companies have the flexibility of partnership but enjoy many other methods of repatriation to stakeholders than sole trader entities'. With companies there is the option of stakeholders receiving Salaries, Interest, and Dividends. Each of these income streams have different tax issues to deal with.