How do I find 2022 AGI before filing so I can determine if I qualify to deduct student loan interest?

You can view your Form 1040 plus Schedules 1, 2 and 3 at any time using the online editions. Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary

Your adjusted gross income will show on line 11 of your Form 1040. 

DoninGa is quite right, you can preview the information on your 1040 form by clicking on Tax Tools, on the left

• Select Tools 
• Then select View Tax Summary, first on the list under Helpful Links.  This will show basic information about the return.
• In the upper left-hand area, in the menu, click on Preview My 1040
• This will show a picture of the information on the tax form and there is a vertical scroll bar on the right-hand side, to scroll down the return.