Foreign tax credit schedule 1 question

[Kat271]

Box 8D shows the foreign income I made. Box 8Z shows the foreign unemployment insurance I received. Number 9 says to add line 8A-8Z. So why did TurboTax subtract the numbers? Please help I’m so confused 

[DaveF1006]

Because your foreign income was excluded in Line 8D, that amount is subtracted from your income.