If my filing status is married filing separately do we do 2 returns, one for each of us separately?

2018 - We are married filing separately (and not living together). Do we both fill out our own Tax Return, and submit as Married filing Separately?

And if we do file 2 separate Returns, do each of us enter both our incomes on each of our Returns?  Or do we only enter our own income on our own Tax Return?

Thanks so much!