Can the Ways and Means Committee Get Hold of Anyone's Tax Returns W/O a Court Order

As most, if not all of you know, the chairman of the Ways and Means Committee has requested President Trump's tax returns. I am not here to have a debate on the situation, but....

If the chairman of the Ways and Means Committee wants the President's tax returns dating back to when he was a private citizen, is it just a matter of the chairman making the request, and the IRS handing them over? Or does there have to be a court order first?

And what about a private citizen? If the chairman of the Ways and Means Committee wants my tax return(s), does the IRS just hand them over upon request?

Can the Ways and Means Committee Get Hold of Anyone's Tax Returns W/O a Court Order