After completed the Turbo tax, how to look back to see if I filed my tax with standard deduction or Itemized Deduction?

You can look at a copy of your tax return.  If the entry on your 1040, Line 8a is anything but: 

$12,000 for Single

Add $1,600 if 65 or older

Add $1,600 if blind

$18,000 for Head of Household

Add $1,600 if 65 or older

Add $1,600 if blind

$24,000 for Married Filing Jointly or Surviving Spouses

Add $1,300 for each spouse 65 or older

Add $1,300 for each blind spouse

$12,000 for Married Filing Separately

Add $1,300 if 65 or older

Add $1,300 if blind

then you Itemized.