After you file

Only honest answer to give you is maybe ... there has been no official word one way or the other ... some say yes some say no.

If you have already filed a 2019 return there is nothing you can do until something happens on the IRS side… and they are ahead of schedule which is evidenced by the test deposits some saw on Friday. 

If you get the DD in the next 2 weeks then you are done. 

If you do not get the DD by the time the IRS finally opens the promised portal (now expected by 4/17) then you can check on the status and/or  update your information at that time.    https://www.irs.gov/coronavirus/economic-impact-payments