The entire gross amount from box 1 of the Form 1099-R must be present on Form 1040 line 4a. Assuming that you have no basis in nondeductible traditional IRA contributions, if the amount on line 4b is not equal to the amount on line 4a reduced by the $8,000 rollover and the QCD, you've entered the Form 1099-R incorrectly. Line 4b should also show the notation "STMT" to indicate that a statement is included with your tax return to show that the reduction in the amount on line 4a is for a combination of a rollover and a QCD. If this is not the result you see on line 4b, I suggest deleting and reentering the Form 1099-R.
When entering the Form 1099-R from the traditional IRA, you must indicate that a portion was transferred to charity and enter the amount. You must also indicate that some of the distribution was RMD and indicate the amount that was RMD (at least $8,000 less than the amount of the distribution; the extra amount distributed was not part of the RMD). You must then indicate that you moved the money to another retirement account or back to the same account, that you rolled over part of the distribution and that the amount rolled over was $8,000. (You should not be making any of the entries in forms mode of the CD/download version of TurboTax.)
