Sale of Home with Home Office

In TurboTax Home & Business, in the sale of our home which had a home office the app says that there is a taxable gain of $xx on the home office depreciation that we took but this value never shows up in the list of income on the 1040; why does it not show up?  The system also insists that the box for Installment Income be checked, which I did not do as this is not an installment sale.  Please explain what I should do for both (1) the taxable gain statement that does not show up in the list of income and (2) the installment box checkmark.

 

Many thanks,

 

SamB