Roundup: Tax deadlines / Wholesale prices / Retail sales By Deanna B. Narveson - June 15, 2021 FacebookXLinkedinEmailPrint ICYMI: Louisiana state income taxes for 2020 are due today for most taxpayers around the state, but residents of Ascension, Calcasieu, East Baton Rouge, Iberville and Lafayette parishes are getting an… Already an INSIDER? Sign in.