Changing the calculation for propane will decrease that tax from 14.2 cents to 6.2 cents a gallon. Propane previously was taxed the same as regular gas.
Two business taxes will decline as part of a multi-year plan established during Gov. Joe Manchin's administration to reduce business tax rates.
The corporate income tax will drop to 6.5 percent on Wednesday, while the business franchise tax will drop to 0.1 percent. The corporate income tax reduction is the last under the plan. The business franchise tax is set to be phased out in 2015.
Another change effective Wednesday involves online retail sales. The state will officially require any online retailer with a physical presence in the state to charge sales taxes for Internet-based transactions, including online purchases from Amazon, Walmart, Target and Cabella's.
Most retailers have been charging the tax for some time. Amazon began charging the tax this fall.