Your questions are confusing too.
You say she has recently returned to work - then you say she is laid off .
Now you want to know how much tax she is liable for ( and she is unemployed )
As a casual worker on € 76 per week , she would pay no tax , as she is entitled to her paye tax free allowance of € 9150 for 2009 .
On € 76 weekly , its unlikely , she would be asked to pay the levies or indeed , any prsi .
Welfare ? - Tell her to join the queue at her local dole office and bring her P60 and P45 with her . They will let her know if she can claim welfare , depending on her contributions to date .