On your 2017 Form 1040, the deduction will be on Line 40. If the amount on this line is equal to the applicable amount in the bubble on the left-hand side of your Form 1040 (unless you or your spouse were born before 1953 or are legally blind - see Line 39), then you received the Standard Deduction. If it is larger than the amount on the left for your filing status, then you itemized your deductions. If you Itemized, you should also have a Schedule A included with your tax return. 

Always print a copy of your completed tax return for your records, and review it carefully before e-Filing.

You will need it if you are audited by the IRS, or to amend because a TurboTax update changes your return.
OR, to answer turbotax questions about it next year.