If a couple filed jointly, where would the individual AGI numbers show?

[rjs]

There is no such thing as individual AGI amounts on a joint return. A joint tax return shows only combined totals for both spouses. You both have the same AGI - the total AGI on the joint return.

Why are you looking for individual AGI amounts? What are you trying to do?

[VolvoGirl]

Do You need your 2019 AGI to efile 2020? The AGI is on 2019 1040 line 8b. If you filed a Joint return you use the same AGI for each spouse.

How to find the AGI.
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/01/25947

If you didn't file 2019 or filed it later in the year or mailed it, then try entering 0 for the AGI. If that doesn't work you will have to print and mail your return.

Or request a transcript from the IRS
https://www.irs.gov/individuals/get-transcript