Navigate back to the section:
- In your open return, select My Account
- Tools
- Topic Search
- Type '8889' in the box, then select GO
On the page, Did your employer tell you about any other contributions?, mark the box Yes and enter the 2015 contribution made in 2016. The entry will be subtracted and only contributions for 2016 will be listed on line 9 of the worksheet.
See attachment.