Where to send IRS Form 433-D?

IRS Form 433-D, which is used to set up a direct debit installment agreement, should be sent to the address specified in the instructions on the form. This typically depends on the state you reside in. If you're submitting the form by mail, ensure you check the latest IRS guidelines or the form instructions for the correct mailing address. Alternatively, you can submit the form electronically through the IRS website if you qualify for online services.