Where do I find my AIG for previous year

On your tax return from last year.

If you used TurboTax last year you can view your 2018 AGI by selecting Documents on the left hand side of your screen.  Select View Documents from: Select 2018 on the drop down menu.

 

OR

 

You can obtain a copy of last year's tax transcript online using IRS link:  https://www.irs.gov/individuals/get-transcript

 

OR

 

If you have a copy of your 2018 tax return, your AGI is located on line 7.