I think they want something more like the Lacerte feature that puts a line of text on the top of the 1040. https://accountants-community.intuit.com/articles/1611360-adding-text-to-the-top-of-form-1040

I wonder if this would do the job in ProSeries? https://accountants-community.intuit.com/articles/1613610-printing-disaster-relief-text-at-the-top-o...

I use a black felt pen.

I have a nice present from a nice client!  A red ink stamp that says " Information Only Do Not Process"..  It works quite well and I have never seen or heard of any way to print that in ProSeries.