My spousal support order changed 1/2 way thru year and only $4k is taxable of the $8k i received. Do i put $4k in the amount or the whole $8?

When i put $8000 in turbo tax and hit the button that says YES, the order changed for taxability, it just takes the whole $8000.  Only $4000 is non taxable by judges order.  Do i put $4ooo?  I don't want them to come back and say i really received $8000 even though only $4 was taxable.