it depends on how much money you made each year.
dont go to HR block. they SUCK.
I am a CPA. take it from me. spend the money, go to a REAL tax accountant (private practice is fine), bring your w2s and all pertinent info, and have them sort it out. you might end up actually getting $$$ back. or you could owe.
GO TO A REALY CPA TAX FIRM. DO NOT GO TO HR BLOCK.