Filing On Line With Turbotax

Hi, quick question on filing with turbotax.  I have the turbotax on my desktop. I thought I read that if there are more than 1 return in a household to be filed using turbotax that only one could be filed online but anyone listed as a dependent who has to file a return has to file in paper. Is that correct?

 

How does filing actually work? Are a lot filed electronically rejected? I have always filed in paper. Just asking.

 

Thanks