To enter your ATAA payments, follow entry for RTAA. To do so: 

1. When you login click 'Take me to my return'
2. Next, select the 'Federal Taxes' tab and then 'Wages & Income' tab. 
3. Get to the listing of all items. Scroll down to 'Other common income' and click 'Show more'
4. Click 'Start/Revisit' next to 'Other 1099-G Income'
5. The next screen will either ask you if you had payments reported on Form 1099-G and you'll need to answer Yes to enter the form. Or, you'll be at a summary screen and be able to add a second form. 
6. When you get to the screen that says "What Type of Payment Did You Receive?" select "Reemployment trade adjustment assistance (RTAA) payment"
7. Enter it under the related