Federal tax withheld on RMD payment more than gross payment made by broker

Schwab erroneously issued a check for the 2020 RMD, and they, withheld $533 for federal tax.  I spoke with their representative to say I did not request nor want the 2020 RMD due to CARE provisions not requiring the RMD for 2020.  They said 'just send us a check for the RMD"  I sent them a check for the entire RMD which they deposited back into the account.  The check included the amount of the federal tax withheld.  TurboTax is not letting me submit my return because the gross distribution (which I have left at $0) is smaller than the tax with held.  How do I move forward?