I would suggest you get hired by the IRS and start rewriting all their ancient code to build in and allow every deduction rule and that it's applied correctly every time so everyone can use it.
The tax laws are so large and so complex and the code running all this stuff is so old and now locked in because they didn't keep up with updating their software as they went along. I'm amazed they got this far. Oh, and like you, I can't use it either. But that's why I have an accountant.