"and then shockingly finding the corrected IT-201 in my software when I opened the return after the client contacted me."

I've been following the NY links since early Feb, and they have described it as Rolling Conformity the entire time. And the State updates to your program happened after you already filed; you told us that, so that is not a shocking surprise. It's what happens, and this year's filing season is worse than last.

If you filed Feb 12 for Fed, you beat Congress. That's the issue here.