Should I send a1040-ES to IRS when I make payment online? or Making direct Payment is enough? I filed 2018 return by TurboTax and have an estimated tax amount by them.

[MinhT · Accepted solution]

When you pay estimated taxes online, you do not need to send form 1040-ES to the IRS. When entering your payment online, make sure to indicate that the payment is for estimated taxes (1040-ES) for 2019.

[PDNEP]

so then, the form 1040-ES itself is the document to help us calculate how much are estimated tax will be, and the voucher is for paying by mail. Is this correct? Thank you very much.

[MinhT]

Yes.

[PDNEP]

Thank you so much for your help. You helped me to make it all clear. appreciate it.

[MinhT]

You're welcome!