The debtor's marital status must first be marked as "Married" in the Client Profile > Debtor Profile section to be able to add the non-filing spouse's income.

The non-filing spouse's income can then be added in the Income section of the application, just like you would add the debtor's income. When adding the source of income you will need to indicate the income was earned by the Spouse.

For more information about income click here!