Get your taxes done using TurboTax

Ok ... the 1040-V was for the entire 2019 federal balance due  ... so if you paid that amount you have nothing more to pay for the 2019 tax year.

Since you owed on the 2019 return the program computed 2020 ESTIMATED tax payments ... there should be 4 1040-ES forms in your file ... you are not required to make these payments if you believe you will not owe more than $1000 on the 2020 return. 

See this for calculating 2020 estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/can-turbotax-calculate-next-year-s-federal-estim...

2019 installment payments on form 9465 is no longer done thru the TT system... instead you are instructed to do so after filing on the IRS website directly ... see the screenshots from the program...