If you are required to file an income tax return then all of your income will be reported on that form. If you have no income all year then unless you had Marketplace insurance OR you did not get the advance stimulus check this year you would have no reason to file a 2020 return. The refundable credits you get for having kids are only allowed if you have earned income. https://www.irs.gov/newsroom/heres-what-taxpayers-should-consider-when-determining-if-they-need-to-f...
