After you file

The IRS did a test batch of DD to see if the system was working properly and some  people have been posting that they got notices that the money was sent but would not be released until 4/15   ... expect more DD to follow on Monday.

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 track and  update your information at that time.    https://www.irs.gov/coronavirus/economic-impact-payments

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EVERYONE NEEDS TO BE PATIENT AS THE IRS PUTS TOGETHER A SECURE SYSTEM FOR MILLIONS TO USE SAFELY  WHILE STILL PROCESSING RETURNS  DURING A PANDEMIC.  I THINK THEY ARE DOING A GREAT JOB (SINCE THEY ARE AHEAD OF SCHEDULE) DURING A TRYING TIME ... PATIENCE WILL BE NEEDED BY ALL.