Can I get a verification code that says I filed my 2018 taxes. Trying to get a home loan?

[DoninGA]

There is no such verification code for filing a tax return.

You can  get free transcripts of your federal return from the IRS - http://www.irs.gov/Individuals/Get-Transcript

For a fee of $50 you can get a complete federal tax return from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf