Perhaps [broken link removed] are relevant in the context of this query? Above these limits some income will be assessable for income tax (and some PRSI may be payable) in which you could use [broken link removed] to quantify the relevant deductions.emc said:It would totally depend on how much tax credits that you are entitled to. If you have a mortgage, are a single parent etc etc. Revenue's website should be able to help you www.revenue.ie