How to i change the RND amount that I entered when I have not yet filed my taxes?

[rconboy1]

It is my RMD

[Critter-3]

Return to the 1099-R input section and edit the form ... continue thru all the follow up question screens to make that change. 

[HelenC12]

To navigate to the follow up screen that will allow you to enter a RMD amount in TurboTax:

1. Sign in to TurboTax and open or continue your return.
2. On the left side menu, select Federal, Wages & Income. 
3.  On the Wages and income screen, scroll down to IRA, 401(k), Pension Plan Withdrawals (1099-R) and select Edit/Add.
4. On the Review your 1099-R info screen, select the 1099-R you want to Review.
5. Continue with the onscreen interview.
6. You'll eventually get to the How much of the $XXX was a RMD? screen. Select one of the options.
7. Enter the RMD amount in the box provided.
8. Continue with the onscreen interview until complete.