If your separation or divorce decree was signed after 12/31/2018, then alimony (spousal support) is not entered on a federal tax return.
Otherwise -
To enter Alimony payments received -
Click on Federal Taxes (Personal using Home and Business)
Click on Wages and Income (Personal Income using Home and Business)
Click on I'll choose what I work on (if shown)
Scroll down to Less Common Income
On Alimony Received, click the start or update button
