The CP 14 letter should provide you with the specific reason why you owe additional tax. If there is no reason given or you do not understand why you owe the tax you may contact the IRS at www.taxpayeradvocate.irs.gov or call 1-877-777-4778. for assistance.
If you enter all your information and TurboTax determines you qualify for earned income credit you should take the credit.
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