Despite the coronavirus pandemic, almost 400,000 Americans moved to a different part of the country to retire last year according to HireAHelper, up a whopping 30% from 2019. Factors such as cost of living, healthcare, and weather tend to be high on people's list of priorities when deciding where to relocate, but taxation is crucial too and can be easily overlooked. Using a recent overview by SmartAsset, click or scroll through as we reveal the least and most tax-friendly states for retirees, taking into account levies on pension income, Social Security, property, and other key taxes that impact seniors, starting with the least tax-friendly.