How can I verify what companies I reported when I filed?

[xmasbaby0]

You can print out the pdf of your return to see the W-2's / 1099's you entered for income.  They are not listed on your Form 1040 but they will appear in the worksheets.

 Every year, before mid-October, print a copy of your current year tax return and save it as a tax file and pdf, too.  That way you will have it when you need it for school, a loan, next year’s tax return, etc. without going through a lot of aggravation (and expense)  to get it.

https://ttlc.intuit.com/questions/1899645-how-do-i-save-my-2018-turbotax-online-return-as-a-tax-data...

https://ttlc.intuit.com/questions/1912544-how-do-i-save-my-2018-turbotax-online-return-as-a-pdf

Note:  You should be saving your W-2's and 1099's for your own records.  Do not throw them away.