@itonewbie your advice works.  

But TP got 2-month automatic extension (Extension Pursuant to Regulation 1.6081-5(a)) and he also filed extension f4868 but no CA extension.  Therefore, how to tell PTO to compute (late filing and late payment) from October 15, 2019 for federal and April 15, 2019 for CA.

Can PTO also compute interest? The interest field does not have instruction to enter "1".

Thanks for your time.