Yes, you can do that if you know the earnings (if any).
Enter the total amount of the returned contribution plus earnings in box 1, and the earnings in box 2a, code "J" in the top box 7 and "P" in the lower box 7 - NOT code 8. The "J" says that it is a Roth and the P says taxable in 2016 on a 2017 1099-R
The interview for a code "JP" will ask if this is a 2016 or 2017 1099-R - choose 2017. The 2017 code P means taxable in 2016 (not 2015) since this will be a 2017 1099-R that you will get - not a 2016 1099-R.
When the 1099-R comes next Jan. 2018, you can ignore it.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
