on my 1099-R box 2b was checked. i made a charitable contribution from my RMD. How am I suppose to reduce the taxable amount?

[MinhT1]

While entering your form 1099-R, if you have entered a birth date which makes older than 70 1/2 in the tax year, TurboTax will ask you if any portion of your distribution was transferred to charity. You then enter the amount transferred to charity.

Code in box 7 of form 1099-R must be 7 and the box IRA/SEP/SIMPLE must be checked.

TurboTax will then reduce the taxable amount.