If you are both named on the mortgage and are owner occupiers of the property (based on this post I'm not sure that this is the case?) then you can both claim tax relief. I don't know what the €2K figure you mention is. The actual relief limits are summarised here:
No. Assuming that you are both in the first 7 years "FTB" preferential relief period of the mortgage then you are each entitled to relief at 20% on a maximum of €10K. But not on the same interest! For example if you are sharing the mortgage 50:50 and are paying €20K or more then you are entitled to €333.33 relief p.m. If you are paying less than that then you are entitled to relief on the actual amount. If you pay €10K then you are entitled to €166.67 relief p.m.
Just wondering I went with and easy step mortgage for the first 3 years so when calculating the trs available do I base it on this figure or the full repayment amount. My mortgage is €240,000.00 over 35 years.