Your question is a little confusing.  If you need your 2018 AGI to e-file, see the following:

How do I find last year’s AGI?

https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947

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If you need the mailing address for your Federal return because your return is being rejected for your 2018 AGI, you can get the mailing address for your state from the IRS.  Go to the following website, click on your State for the mailing address.

https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment