Filing 2011 tax returns for a minor?

I'm 17 years old right now and i had to file this year even though i was claimed as a dependent on my mothers tax return cause i made more than the single deduction ($5950). For last year though i was told i didn't have to file cause i only made $1200 for that year. I recently found out i could get all the... show more I'm 17 years old right now and i had to file this year even though i was claimed as a dependent on my mothers tax return cause i made more than the single deduction ($5950). For last year though i was told i didn't have to file cause i only made $1200 for that year. I recently found out i could get all the tax witheld back if i had filed my taxes (which i didn't) but i could do so this year. Only 69 bucks were witheld but every dollar counts now that i'm trying to save for my car. What would be the appropriate forms i'd have to fill out? Could i do it online for free ? If my taxes were already filed will this delay my refund? Thanks in advance!
Update: FYI i was claimed as a dependant in 2011.
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