Please review the following TurboTax FAQ on how to access your previous year's return:
https://ttlc.intuit.com/replies/5574744
You can also request a copy of your Tax Transcript from the IRS here: https://www.irs.gov/individuals/get-transcript
If you are just looking for your AGI, please review the following TurboTax FAQ on locating your previous year's AGI:
https://ttlc.intuit.com/replies/3301618
