On September 30, 2019, the Pennsylvania Department of Revenue issued Corporation Tax Bulletin 2019-041, announcing that "Wayfair has confirmed that out of state corporations are considered to be doing business in this Commonwealth ... to the extent they are taking advantage of the economic marketplace of the Commonwealth regardless of whether they are physically present in Pennsylvania." According to the Bulletin, although all corporations with economic nexus under that standard should file corporate tax returns in Pennsylvania, there will be a rebuttable presumption of corporate net income tax nexus for any corporation with at least $500,000 of sales "sourced to Pennsylvania per year pursuant to the sales factor rules contained in 72 P.S. § 7401."