What is the most efficient way to file married filing separately - on desktop? Do I enter info twice for both returns or is there a way to add our info once and be done?

I want to turbotax to figure out who gets the child tax credit and what is the best option on whether we should itemize or take standard deduction.  The way I have it now, the two returns are not linked and we both are claiming the child tax credit which is not allowed.  Are we able to link both returns for maximum legal returns?