Find yourself a good local accountant.You need to build a good working relationship with them
Do not just drop off your books,have him explain to you what he his claiming for and why this is the best for you.Look at all the options open to you.Do not forget he his working for you expect from him the same commitment to the business as any other employee.
A good accountant can make all the differance to a company.I have owned two limited companies the first was wound up as I was making very little profit.The second was sold as a profitable business.
One of the main reasons was the financial management of the second company
Put a bit of time in on the Revenue website,do your own research,all the facts are on there.There are no "secret" ways to reduce your tax liability only a sound knowledge of the tax system as it applies to your company
Best of luck with your new venture