Now is perhaps a good time for a reminder that IRS publications and unofficial announcements, along with $5, would buy you a cup of coffee if any Starbucks are open.  We haven't seen the text of the Senate bill, and it has not been enacted.  If it sets the filing date as July 15, and does not mention other deadlines like IRA and HSA, it is probably safe for federal tax purposes to delay funding an IRA.  For state law, your mileage may vary.  

IRS started out using the word "extension."  Now, it is moving to "postponed."  These eggs will probably hatch, but let's not start making chicken soup quite yet.