I have no way to test it. Just make sure you are doing everything from the special website portal linked from retailmenot and not from the regular TurboTax online website.
When you go to the special portal site from retailmenot, it should tell you the discounted prices before you start your TurboTax return at that site. So you'll know what the discount is when you select one at that site.
Here's how to check your fees at any time during preparation. I don't know if it will show the discount or not, or if you have to wait until you are presented a "Review your order" screen near the end.
Make sure you are starting and accessing your return at the special TurboTax portal site that you get to from the retailmenot offer.
Select a product there.
Or if you have already started a return, use the SIGN IN button.
Once past the blue-green screen, click in the left menu column on TAX TOOLS, then TOOLS.
In the Tools window, choose MY FEES.
