No one in this users forum knows for sure, neither do most/any of the TTX reps that might poke in here occasionally.
I suspect it would be implemented in the next 3-4 weeks. Even so, the IRS won't start accepting tax returns until ~3rd week in January, so there is no particular rush.
( That is , unless the current president actually signs the budget bill Congress sent to him last week...if he does sign it, then the IRS start date may be delayed even further....but that's just a guess )
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
