Incorrect bank account number for automatic withdrawal (not refund)

I transposed two digits in the bank account number that was to be used to PAY taxes due on a form 1041 (trust). The routing number was correct. How do I communicate the correct number to the IRS? The return was efiled by Turbotax and accepted by the IRS on March 19. (Same erroneous account number was used for the California form 541.)