Understand have until 07/15 to file and pay Federal and some states (like mine) follow Federal.
If I file both Federal and State returns on 05/15, can I pay both tax owe on 07/15 via online without incur interest and penalty or must file and pay at the same time?
What about Q1 Estimate tax for Federal and State? Do I have until 07/15 to pay Q1? When pay online, does it matter to both tax bodies if I separate or combine Q1 and Q2?
If I have not filed 2019 for both tax bodies by 04/15, are they expecting 2020 Q1 Estimate tax payment by 04/15?