Stimulus " IRS-- Non'Filers" Question

Hello Neighbors,      We are wondering if anyone has any issues trying to input their banking information in the IRS "Get My Payment" portal, using the "Non-Filers" prompt.       Here's our problem: we need some help in navigating the  IRS "Non-Filers" Form so we can have our banking/direct deposit information correctly submitted.      One area of instruction requires, if filing jointly, to give the 2018 AGI. (STEP 2) There are two boxes side by side for this information-- a taxpayer box & a Spouse (if filling jointly), box.  I'm confused on where to correctly input that information--in one or both boxes.      My question:  In which box or boxes does the AGI go?      Your help is greatly appreciated.            George