@karenrner
In terms of editing / overriding, to my knowledge, you can only do this on the desktop version, not the online version.
Reading the threads, what you can override is the line that calculates the average outstanding mortgage debt you have - i.e., the issue we are having. So if you calculate by hand what your average mortgage was for the year, using the IRS' method, you can input that value and override TurboTax's incorrect calculation, which should make all of your numbers in turn accurate. At least, this is my understanding, based off of what the desktop users have reported. Just to answer your question about forms, overriding, etc.
