In the Payment area of the File section of TurboTax Online, if you choose to pay by credit card, you can either leave the box checked to use the address on your tax return as your billing address, or if you uncheck the box, TurboTax provides entry fields for you to enter a different address. If you return to the Payment area you should be able to see what address was entered.
If you save a copy of your completed return with all worksheets, the information should appear there as well.