Individuals must report annually on foreign financial accounts if balances exceed a threshold amount. The question raised is whether these balances include cryptocurrencies. The Financial Crimes Enforcement Network may change the rules to specifically include these digital currencies. But instructions to FinCEN Form 114 for 2020, which is due April 15, 2021 (with an automatic 6-month extension) make it clear that cryptocurrency is not factored into balances as yet (https://www.fincen.gov/sites/default/files/shared/FBAR%20Line%20Item%20Filing%20Instructions.pdf).
A tax technique of applying a loss or credit from a current year to a later year. For example, a business net operating loss may be carried forward 20 years instead of being carried back.