silverfox1 said....when exactly would the changes take place?
Well, you did ask a very practical question.
Tax increases to pay for the plan I think could come online quicker than the press has indicated. If there is a surcharge based on income level, for many people that could come with the first quarterly estimated tax payment. Due the 15th of the month of the first month of each quarter.
If health insurance is taxed, that could come online very quickly. Your payroll processor would pick that up based on your W-4 status.
The rest would depend on the final form of the bill and whether any new agencies have to come online from which regulations would be promolgated. I'd guess those in Congress won't want to wait that long, but it will give them time to work through immigration legislation so they can bring those folks online when everyone else has to file to see what form of assistance -- if any -- of which they might qualify.
So who knows. The bill may pass then get axed if enough people are truly pissed off.