My understanding is the house tax bill has already passed. If the senate passes their tax bill, from what I've read, the next step is that the leaders of the senate and house will get together to work out any conflicts between the bills, and then send it up to the president for signing.
Here's the thing though, if it's just the leaders hashing out what the actual final bill is, and there's not another vote in both branches of government on what the bill ACTUALLY contains... what is the point of any of this?
If there isn't another vote, Senate/House leaders could just concede to any amendments asked for, and then change them to whatever they wanted during reconciliation before sending it to the president.
Is this seriously how this works?