I have to question what you said: "... I decided to rollover this account to my work Roth IRA,..." If you mean a designated Roth - a 401(k) Roth - at work, a Roth IRA is not eligible to be rolled into any other account type except another Roth IRA. You should check to make sure that this was a legal rollover or not - it could be costly if not corrected before the extended due date of Oct 18, 2017 if rolled into the wrong type of account.
See IRS Pub 590A on allowable rollovers. - <a rel="nofollow" target="_blank" href="
https://www.irs.gov/publications/p590a/ch01.html#en_US_2016_publink1000230568">https://www.irs.gov/p...>
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As to the $678 --
You can always withdraw your own Roth contributions tax and penalty free. Only the earnings would be subject to the penalty and tax. Roth distributions are your own contributions first and then any earnings. Since I am sure that you previously contributed more than $678 in after-tax money to the Roth. Enter that amount in the prior year contribution when asked for and it will not be taxed again.
Enter a 1099-R here:
Federal Taxes,
Wages & Income
I’ll choose what I work on (if that screen comes up),
Retirement Plans & Social Security,
IRA, 401(k), Pension Plan Withdrawals (1099-R).
OR Use the "Tools" menu (if online version under My Account) and then "Search Topics" for "1099-R" which will take you to the same place.
Be sure to choose which spouse the 1099-R is for if this is a joint tax return.
Be sure to pick the correct 1099-R type: Standard 1099-R, CSA-1099-R, CSF-1099-R, RRB-1099-R.
[NOTE: When you get to the "Your 1099-R Entries" screen where you can add another 1099-R, use "continue" to keep going as there are additional interview questions after that screen in most cases. You can always return as shown above.]
One of the followup questions will ask for your prior year contributions not previously withdrawn. Those contributions that still remain in the Roth will not be taxed or subject to a early withdrawal penalty.
**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.**