Direct Deposit Info

I was going to submit a 2019 tax return for my son even though he is not required to file - no tax due nor a refund - just so the IRS would have his direct deposit info in his file to speed his coronavirus rebate check. How do I enter his direct deposit info if no refund or tax due? When I click on the 1040 worksheet in forms it won't let me enter the info because there is no refund. Any help is appreciated. 

 

Thanks!