It passed only MINUTES before you posted this question. It still has to be signed - so it's actually still not even officially a law yet. Of course, we know it will be signed but until it is the IRS can't begin to start setting policies and procedures that then have to go to the software companies, etc. There is absolutely, positively no way anyone can answer this question MINUTES after Congress votes.
A few weeks at BEST, but it will be buggy. Possibly a few months. And perhaps NEVER - perhaps the IRS will say, just file and we'll take care of it.
