Am I entitled to repayment of tax if I become unemployed?
If you remain unemployed for four weeks you can claim a refund from your local Revenue office of tax paid, by using the four weeks unused tax credit. You can do this every four weeks until all tax has been repaid or the tax credits are used.
If emergency tax was deducted from you, you may apply immediately for a refund on becoming unemployed.
To claim a refund you should complete a 
Form P50 (First Claim for Tax Repayment during Unemployment) (PDF, 365KB) and return the completed form together with Form P45 to the Revenue Commissioners.
Any queries give me a call on 091 763817 or email me at oliver@taxreturnhelp.