Did you enter the 1099 before starting the amended return? That is wrong. Take it out and make sure the return is back to the original return. Then you do the amend.
If you don't see a button for Need to Amend a Filed Return? on your home screen then you can get to it here. Go to:
Federal Taxes -or- Personal (for H&B)
Other Tax Situations
last section, Other Tax Forms
Amend A Return - Click the Start or Update button
Also you first need to check the filing status inside the program so it knows it was filed and accepted. Open your return and go up to the top black menu bar first item
File > Electronic Filing > Check Electronic Filing Status
Then save your return and close it. Close the program and reopen it.
