State lawmakers are looking to repeal a law that has put big businesses on the defensive in tax disputes in Missouri. Current law places the burden of proof on the department of revenue in tax disputes with individual citizens and most businesses. However, current law has shifted responsibility to the taxpayer when that entity is a business worth more than $7-million dollars and employs more than 500 people. Some say the law is a double standard that presumes big businesses are guilty until proven innocent. The senate passed legislation yesterday that would treat big businesses the same as other taxpayers in disputes. A similar bill recently passed in the house.