 
<translate> Zaa ajụjụ ndị na-esonụ site n'iji ụbụrụ gị zaa ha. Ntughari: Ụlọ ahụ gafere ụdị nke ikpeazụ nke ụgwọ ahụ na Disemba 19, 2017, ọ bụ ezie na maka usoro iwu nke Senate, obere mgbanwe dị mkpa ma a na-eme ntuli aka ọzọ na Ụlọ. Ụlọomeiwu kwadoro nke ikpeazụ n'ụbọchị iri abụọ nke ọnwa Disemba site n'ọnụ ọgụgụ vootu dị 51-48 na nke ikpeazụ ahụ bụ nke Ụlọomeiwu kwadoro n'ụbọchị ahụ. Onyeisiala Donald Trump bịanyere aka n'akwụkwọ iwu ahụ na Disemba 22, 2017. Ọtụtụ n'ime mgbanwe ndị iwu ahụ webatara malitere ịdị irè na Jenụwarị 1, 2018 ma agaghị emetụta ụtụ isi nke 2017.  Ajụjụ: Dabere n'akụkụ Akwụkwọ Nsọ a, olee mgbe ụgwọ ụtụ isi nke ụlọ omebe iwu ga-amalite ịdị irè? <eng> Answer the following Q with stream of consciousness. Passage: The House passed the penultimate version of the bill on December 19, 2017, though for Senate procedural reasons small changes were needed and a revote was held in the House. The Senate passed the final version on December 20 in a 51 -- 48 vote and that final version was passed by the House of Representatives on that same day. The bill was signed into law by President Donald Trump on December 22, 2017. Most of the changes introduced by the bill went into effect on January 1, 2018 and will not affect 2017 taxes.

Question: Based on this passage, when does senate tax bill go into effect? 