My estimated tax forms say 'Do Not File' even though I have filed my taxes and they were accepted. How do I get them to print without 'Do Not File'?

They should be printing but I don't recommend using them. You can make payments safely online at Payments.

If you want to print blank ones here are Form 1040-ES, Estimated Tax for Individuals.

You can also come back during the year and make changes to see how your estimated payments should be adjusted.