What is the AGI for the Primary Taxpayer?

[AmyC]

The Adjusted Gross Income for the first person listed on the return. Form 1040 line 11, before deductions to find the taxable income.

See How do I find last year’s AGI? for the lookback or filing.

[VolvoGirl]

Do you need the 2019 AGI to efile 2020?  If you filed a Joint return last year there is only 1 AGI.  Enter the same AGI for each spouse.  

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 then try entering 0 for the AGI. If that doesn't work you will have to print and mail your return.