Tax refund on what? I'm not RC but you pay tax on money earned? What money will you have earned in 3 months? Oh, the joys of being self-employed!
Maybe better to ask what can you claim off the State? There's loads of stuff you can claim! (Sometimes it seems like) everyone else is doing it so why not you?
Maybe Family Income Supplement (FIS), mortgage interest relief, disability benefit, fuel allowance, jobseekers benefit and/or PRSI relief. Don't forget the Medical or GP card? Maybe the Community Welfare Officer might give you an allowance for new clothes since you probably lost weight, maybe new air fresheners for your taxi, maybe a service since your oil might be dodgy after 3 months. Maybe a new 65-inch TV with SKY subscription since all unemployed people have one... Were you alive/in hospital at Xmas - you get double money for that! Don't forget your wife/partner/children suffered as well and they *need* financial help too!