How do I access the print center after filing a return? The only option seems to be to download the PDF of the few pages sent to Treasury and my State.

Please log back in your TurboTax account and "add a state" to open the return back up (you are not really adding a state, just to open it back up), then select Tools on the left, Print Center and choose the print center, then select returns and choose to print just the tax return or to include all worksheets as well.