This holiday weekend roundup of Bloomberg Tax Insights looks at the IRS’s unhelpful PPP loan guidance, trade and tax policy under a Biden administration; the best time to claim Social Security benefits; the Spanish digital services tax, and foreign direct investment in Vietnam.

States and nations grapple with budget and tax challenges as second waves of coronavirus infections prompt more lockdowns. Discussion of any new federal virus aid goes silent during the Thanksgiving break. Catch up on the ways the coronavirus outbreak continues to change the world.

The Week in Wayfair: A federal examination of tax compliance burdens placed on sellers and marketplace facilitators by the Supreme Court’s Wayfair ruling; the incoming director of the Federation of Tax Administrators promised to work on strategies that harmonize tax rules across state boundaries; and Chicago may discuss options for a “package delivery tax.”

Diverging approaches to taxing multinational companies with digital business models are taking shape on the global stage—potentially leading to more complexity and a bumpy ride for multinationals.

Proposals to raise taxes on wealthy Californians are likely to resurface in 2021 now that voters rejected a property tax increase that would have raised as much as $11.5 billion a year.

Colorado Gov. Jared Polis gave restaurants, bars and food trucks a 30-day extension to file sales taxes, saying eateries have been hardest hit by the Covid-19 pandemic.

Illinois plans to borrow an additional $2 billion from the Federal Reserve in an effort to prop up its already-struggling finances as the state’s bills rise amid the pandemic

Illinois plans to borrow an additional $2 billion from the Federal Reserve, tapping the central bank’s municipal lending program for the second time, Governor J.B. Pritzker said during a press conference on Wednesday.