"I sent the wrong 1040-es payment voucher form and I also wrote the check to the Internal Revenue Service, not United States Treasury."

[JuttaS · Accepted solution]

Oh, don't worry, they'll accept it. This post from earlier describes a similar scenario:

https://ttlc.intuit.com/questions/3898419-my-husband-had-the-money-order-made-payable-to-the-interna...