I am drafting a set of comments in response to the FCC's fee increase NPRM.
I attempted to determine whether that NPRM has actually been published in the Federal Register, with an accompanying deadline for sending comments - that search led me down a rabbit hole of fedgov gobbledygook with no clear resolution to the question in sight.
But my tentative conclusion is that the NPRM has not yet been published in the Federal Register, and that therefore no deadline for submitting comments has yet been established. If, however, anyone knows that to be incorrect, please let me know.
Once all comments have been submitted by interested parties, as part of the process a second deadline is generally set for submission of reply comments addressing points raised within the initial set of comments. Many years ago I had made reply comments regarding comments that another ham had submitted for the NPRM that proposed authorizing the issuance of 'vanity' callsigns, and IIRC the FCC's final report and order on the matter quoted a point that I had made in my reply comments that the FCC used in support of the reasoning behind one part of the decision that they had made. So, there is at least some potential to have an impact on rulemaking proceedings by submitting formal comments.
The link for filing an 'express comment' through the FCC's 'ECFS' (Electronic Comment Filing System) is
https://www.fcc.gov/ecfs/filings/express - they also have a more formal and lengthy 'standard' form for submitting comments at
https://www.fcc.gov/ecfs/filings, but that is not needed in order to get your comments on file.
Incidentally, in researching this I came across an FCC web page for searching already-submitted 'ECFS' filings
https://www.fcc.gov/ecfs/ (my search was for docket 20-270 - I entered that number into the 'Specify Proceeding' field as the only search specifier, and clicked on one of the suggested links without submitting the form - that took me to
https://www.fcc.gov/ecfs/search/filings?proceedings_name=20-270&sort=date_disseminated,DESC which showed a total of 1,116 comments that had already been submitted (most-recent first).