Don't enter the return as a contribution, it is not a contribution.
Instead, when you enter the 1099-R for the withdrawal, there will be a screen that says something like "Let's look for ways to lower your taxes" and one of the options will be a rollover. Indicate that you did a partial rollover of $200,000 (a return to the same IRA or a rollover to a different IRA are both considered rollovers.)
