Can you prepare and print more than one federal and state tax return with turbo tax online for the one fee?

Can you prepare and print more than one federal and state tax return with turbo tax online for the one fee? Can you e-file for just one fee? So can I use the single purchase to do my tax returns and then also do tax returns for my elderly father and two adult children for the single fee?  You can do up to five on the desk top but the software requirements will not let me download onto my old MacBook air so I am trying to see if I can avoid buying a new computer by doing it online instead.  I am conflicting answers on this so its very confusing.  Here's what I found on line:  "Can you file more than one tax return with Turbo Tax Online? It allows you to prepare and print unlimited federal taxes returns, and e-file up to five at no charge." In other places, it says you can only e-file one for the online version.  Please help clarify!