In an article published on Jan. 31, 2019 in Bloomberg Law, senior counsel Jennifer Weidler Karpchuk discusses Philadelphia’s decision to apply principles of the Wayfair decision to business income generated in the city. Karpchuk says, “As far as I am aware, Philadelphia is the first city to take action in regard to its income tax. It definitely does rope in people that it didn’t before. Some businesses may have to take a closer look at sales in Philadelphia.” The changes became effective as of Jan. 1, 2019. Subscribers to Bloomberg Law may access the article here.