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.
You can obtain a copy of last year's tax transcript online using IRS link: https://www.irs.gov/individuals/get-transcript
If you have a copy of your 2018 tax return, your AGI is located on line 7.
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