Nothing has changed here. It's a "retail" program designed for the needs of the vast majority of taxpayers. If you're dealing with trades or anything else that exceed $10 million you're outside of that vast majority.
If you're dealing with stock trades where you're entering numbers ($s x # of shares) and one of the numbers exceed the limit, then sometimes you can move the decimal point of the "too large" number X number of places to the left and move the decimal point of the other number X number of places to the right. It's the Product number that's really important in an income tax return.
