I filed 2020 returns by mail, because requested ITIN# for wife.
Fedex delivered my documents on 1 March to IRS TX office.
Received ITIN number for wife in June in the mail.
In July IRS returned her passport.
3rd week of September my refund showed: filing married jointly, but not processed yet (before it showed filing married separately based on 2019 return).
On 1 October my refund showed refund received, refund approved, 6 Oct direct deposit date.
On 6th October my US bank received my refund plus 27USD for late tax refund.
The refund included missing 1st stimulus payment for my son and child tax credit.