Per the Office of Tax and Revenue Frequently Asked Questions (1/12/2024):
Yes. However, you must be current on an existing payment plan.
If you establish a payment plan on the day that you are requesting a Certificate of Clean Hands, a certificate won’t be generated until the first payment has posted to your account. (Processing may take two or more business days).
The first payment of a payment plan is generally not required until the 1st or the 15th of each month, which may be weeks after the payment plan has been established. In this instance, a Certificate of Clean Hands will not be issued until the first payment has cleared your bank account.
https://mytax.dc.gov/WebFiles/faq/faq.html