Read the entire post, it's obvious that 2019 AGI is extraneous and they just mention it to explain why 2020 is important. 

To @SaoneFinancial -- yes, a few returns (both paper and e-filed) are taking up to a year to process, but most are taking more like two months.  This should be a lesson to your clients that procrastination is risky.  My bet is that they had everything they needed for you to prepare the return by February 15.