I started a sole business back in 2016 that didn't generate any income or expenses. Didnt file.however it did generate a lil income in 2021will i be in alot of trouble?

I started a sole proprietorship business back in 2016 that didn't generate any income or expenses..I have never filed..since the business was not running.. however it finally generated a lil income in 2021...what can I do?