If Form 1040 line 8 is more than Schedule A line 17, your tax return is probably using the standard deduction instead of itemized deductions because the standard deduction is higher than your total itemized deductions. In that case there is nothing that has to be corrected.
If that does not answer your question, please provide the following information.
What is the EXACT amount on Schedule A line 17?
What is the EXACT amount on Form 1040 line 8?
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