Below are steps to find out how many TurboTax accounts you have that are linked to the same e-mail address:
https://ttlc.intuit.com/replies/3302270
Also, if you are still not able to access your prior
year return, you can request a free online transcript of your 2017 tax return
from the IRS. Use this link: IRS Get Transcript
Here is more
information on where to find your 2017 AGI on your prior year tax return:
https://ttlc.intuit.com/replies/3301618