I don't know how to print my 1040 from 2018. I need instructions on how to do so. I have a printer.
You may access your 2018 tax return filed with Turbo Tax by following the steps in the FAQ below:
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/01/27010
To print them, navigate to the section entitled your tax returns and documents click show select the year 2018 and then from there you will get the option to download/print as a PDF.