Is there as way to find my 2019 AGI before completing my tax return?

No. You can find your 2019 AGI after you file, as this number will likely fluctuate as you add or remove income or expenses. You can use the link provided below to walk you through where you can view your 2019 AGI:

How to view my 2019 AGI

You can view the AGI in TurboTax online after you entered your income and deductions. 

From the menu on the left, you would go to :

1. " Tax Tools"  then select  "Tools" 

2.   Under Other helpful inks, select "View Tax Summary"

3.  Under the Summary page, the Adjusted gross income is item 3