Tax questions when working abroad...

I work for an Irish employer but I've been working on site in the US since March of 2008 with some of our clients. I have returned to Ireland for a couple of weeks (approx 3 weeks) since March 2008.

I have being paying full PRSI and PAYE on my income paid by my Irish employer. Am I entitled to claim any additonal tax credits / refunds as I have not been resident in Ireland for the majority of the 2008 tax year?

If so, how do I go about it and would it be advisable to hire a tax advisor?

If you are working in the US, you will probably have a US tax liability. Has your employer not sorted this for you?

Firstly speak to your employer - it is likely that they have US withholding obligations if you have spent more than 183 days in the US.