Prior to April this year, If you were doing work for private customers only then you didn't need one.
If you were working for a contractor then you would have needed one, but as far as I am aware the system changed in April, so now you don't need one anyway.
But, as you are just starting out, then best thing to do is ask the nice people at the tax office while you are there.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
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