If your parents are claiming you as a dependent, you cannot take your $4,050 personal exemption. But you are still entitled to the benefit of either the standard deduction or itemized deductions.
If TurboTax is recommending the standard deduction, it is because you do not have enough potential itemized deductions (medical expenses in excess of 10% of AGI, mortgage interest, state income tax, real estate tax, etc.) to make the itemized deductions more valuable to you than the standard deduction.
