Did you use the googles?

who sends form 433-d

"Form 433-D is the basic installment agreement, while Form 9465 is the Installment Agreement Request. This form allows the IRS to set up automatic payments with a taxpayer. ... It affords the taxpayer a lower user fee than a regular agreement."

So, you would Request the agreement (9465) and then, the IRS responds (433-D).