It says our corporation BN # file is not valid. The number is 2543045 In the field requested its 2543045 RC0001.The software does not accept this and we cannot override.

Hello,

The software uses the same system as CRA to determine if the Business Number BN is valid or not, please check the number again a BN should be 9 digits before the RC 0001 example 12345 6789 RC 0001.  Based on what has been written above you are missing a couple of numbers.