The World Tax Advisor includes in particular a special COVID-19 section:

• Botswana: Economic and fiscal measures introduced in response to COVID-19
• Canada: COVID-19 – Update on the Canada Emergency Wage Subsidy (CEWS)
• China: Export VAT refund rates increased on over 1,400 goods
• Colombia: New extensions for corporate income tax compliance, filing overseas assets return
• Cyprus: Relief from import duties and VAT exemption on imports needed to combat COVID-19
• European Union: EU permits import duty relief and VAT exemption on certain goods in view of COVID-19
• Germany: COVID-19: Additional tax measures announced and implemented by government
• Hong Kong: Third round of tax and financial relief measures in response to COVID-19 announced
• Indonesia: Implementing guidance issued for COVID-19 tax incentives
• Italy: Law decree introduces additional urgent tax measures in response to COVID-19
• Japan: Additional tax relief proposed as part of COVID-19 emergency economic response plan
• Oman: Tax relief measures announced in response to COVID-19
• Portugal: Deadline for issuing e-invoices for B2G transactions postponed to 2021
• Russia: 2019 tax return filing deadline for individual taxpayers extended in view of COVID-19
• Singapore: IRAS guidance on company tax residence, PE, and employee taxation in view of COVID-19
• Spain: Economic and fiscal measures introduced to address impact of COVID-19
• Taiwan: Relief measures announced to help industries affected by COVID-19
• United States: Expanded stimulus bill resource list available
• United States: New IRS releases provide filing and other tax relief
• United States: Transfer pricing considerations in the time of COVID-19