No, tax withheld is withholding, not an estimated tax payment.
I assume you mean RMD, not RDD. You should have received a Form 1099-R for your RMD withdrawal from an IRA or other retirement account. The federal tax withheld is in box 4 of the 1099-R. Just enter it in TurboTax as it appears on the 1099-R. TurboTax will handle it correctly. It will be included in the total tax withheld on Form 1040 line 16.
