Entering the final stretch of an arduous process, the Republican-controlled Senate began voting Monday on amendments to President Donald Trump's massive tax cut and spending bill, with the goal of passing it later in the day.

Here’s the latest on what’s in the bill. There could be changes as GOP lawmakers continue to negotiate. Republicans say the bill is crucial because there would be a massive tax increase after December when tax breaks from Trump’s first term expire. The legislation contains about $4.5 trillion in tax cuts.

The Senate is inching toward passage of Trump’s “big, beautiful bill,” which would take until Tuesday morning after Democrats submitted hundreds of amendments.