How? Submitted my 2018 return and received confirmation of receipt from Revenue Canada. I did not see where I might have saved a copy of my return, with line item etc. ?

how do I know my tax return was filed with CRA

Here is how you can print/save a pdf copy of your tax return in TurboTax Online: https://turbotax.community.intuit.ca/replies/2648070

Here is how to print a copy of your return in TurboTax CD/Download: https://turbotax.community.intuit.ca/replies/3293223

Here is how to save a PDF copy of your tax returns in TurboTax CD/Download: https://turbotax.community.intuit.ca/replies/2985586