What is "pay only when you file"?

[peipeieasytax]

If I use the Turbotax Premium Live CPA version, but later find a lower tax due by using other tax software. Do I still need to pay for both the Premium and the Live CPA? What exactly is "pay only when you file"?

[DoninGA]

Using the TurboTax online editions you are only required to pay for the edition being used if you are either e-filing the tax return or printing the tax return.