Even though the Roth IRA distribution would not otherwise be taxable because it is no more than your contribution basis, the distribution must be reported as a CRD on Form 8915-E which will make it eligible for 3-year repayment and allowing it to be disregarded with respect to the one-rollover-per-12-months limitation. If you don't report it as a CRD, say, because you do not meet the requirements to be an affected individual, putting it back in the Roth IRA would be an ordinary rollover subject to the 60-day rollover deadline and the one-rollover-per-12-months limitation.
As a side note, I'll bet that TurboTax will not be properly adjust your Roth IRA contribution basis when you repay the distribution, so you'll want to pay attention to that.
