When your return is zeroed out (see below FIRST), you'll enter the 1099 in
INT = Interest
DIV = Dividends
B = Stocks, Mutual Funds, Bonds, Other
Since you have already filed your return, first print out a
copy of your original return for your records.
Then go into Turbo Tax and click Amend (change) a filed
and accepted return under Manage Your Return.
It's zeroed out (which is why you need to keep a copy of
your original return). You can then add any additional info that you've
received, and Turbo Tax walks you through the rest!
Addresses to Mail Amendments To
You mail the 1040X along with any schedules that
changed as a result of the amendment (except the 1040).
You also include the federal copy of any new W-2s or any
1099-Rs that had tax withheld.
