Per IRS Instructions for Recipient for Form 1099-G, on page 5:

Box 5. Shows reemployment trade adjustment assistance (RTAA) payments you received. Include on the “Other income” line of Schedule 1 (Form 1040).

To enter the information from Form 1099-G into the TaxAct program:

1. From within your TaxAct return (Online or Desktop), click Federal. On smaller devices, click in the upper left-hand corner, then click Federal.
2. Click Other Income in the Federal Quick Q&A Topics menu to expand, then click Prizes, awards or other miscellaneous income.
3. Continue with the interview process to enter all of the appropriate information.
4. On the screen titled Miscellaneous - Amounts Received, enter the Reemployment trade adjustment assistance (Form 1099-G, box 5) amounts, then click Continue.

Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.