I put in "85% waiver" on Part II Box A checkbox line on Form 2210 just like you did and got rejected on Feb 15 and Feb 16. I assume you filed today on Feb 17? Maybe IRS has caught this issue, and fixed their e-file algorithm maybe just today??
I am down to 2 free e-files so I have to be careful to do this right within next 2 e-file attempts.
