Turbotax Product upgrade

I purchased TurboTax Premier and downloaded exe and installed it on my PC. I signed in with my intuit/turbotax account via desktop premier app. I am trying to get TurboTax Online (some help with my tax filing). 

  • Do I have to pay again for TurboTax Online? 
  • Why cant I see my tax filinf file when I login to my account via a browser. I am signed in my desktop app and signed in my browser as well. Should the file not appear at both places?
  • Will my TurboTax Premier cost be deducted while I try to purchase TurboTax online? Of full service?