Do not have access to 2018 for obtaining AGI or PIN. How else can I verify?

[xmasbaby0]

https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/270...

You can get a free transcript from the IRS:   

https://www.irs.gov/individuals/get-transcript

[Critter-3]

If you cannot  get the AGI then  your ONLY option is to print, ink sign and mail in the return.   In the future, save a PDF to your computer and/or print a paper copy for your records ...  you will need the prior year AGI every year going forward.