It seems the Senate cannot "initiate" new taxes ; only the House can do that.
But the Senate did slip in new taxes into the S510 bill which they passed.
So this bill may be "blue slipped"..rejected by the House and sent back to the Senate to be redone.
Probably not enough time left in this lame duck session to do anything.
S 510 Food Safety bill now dead in the water due to blue slip mistake
"It is now being revealed that US Senators slipped up in a big way when passing the Food Safety Modernization Act on Tuesday: They added what are effectively "new taxes" into the bill, and according to the U.S. Constitution, only the House of Representatives can initiate legislation requiring new taxes."