I have filed, I owe the IRS, how do I pay them?

[tedrunyon]

can I send the IRS a cashiers check for my payment?

[fanfare]

Yes

visit irs.gov to discover various payment options.

[Anonymous]

if you have a checking or savings account, don't use a cashiers check,  follow other advice to use online payment. you can even specify the payment date (on or before 4/15/2020) and you can print out a receipt. no fees. 

you can also pay online by debit or credit card but there is a fee