Maybe because the law was signed less than a week ago and the IRS has not published anything official and we're all focused on 2020 tax return prep rather than our whining clients as to how much I'm going to get and all the unemployment forms and whether states will delay and tomorrow's 1065/1120S deadline and everything else.  To me 2021 stimulus calculator is the last thing I care about and if my clients want to calculate let them go to the Wall Street Journal.