Do I need to File Both Q1 and Q2 Estimated taxes in 2020?

Since the due date for both Q1 and Q2 are the same this year (extended to July 15, 2020 due to Covid-19), do I need to file estimated taxes for the 2 quarters separately or can I just figure my estimated taxes through July 15 (essentially for the first half of 2020) and just file Q2 estimated taxes?  It will be much easier to figure as one and just pay once, but I am concerned that the IRS might penalize me for not filing Q1 estimated.

 

Thank you.