I'm borrowing this one straight from Indivisible - they continue to do excellent work. According to a 1924 law, Congress can obtain tax returns to ensure that no executive branch employee has any corrupting conflicts of interest - including the President.
It's increasingly clear that those tax returns have something that will lay bare Trump's ties to Russia. Rep. Bill Pascrell of NJ is circulating a letter to his fellow House members to get them to sign off on this, and he needs all the help he can get.
Since I'm borrowing this action straight from the Indivisible Group, I suggest you get all the details you need by checking this link here:
To find your congressperson: https://www.callmycongress.com/