It says to enter a valid sin that is different from my partners. I know the one i entered is correct? What is wrong?

It says to enter a valid sin that is different from my partners. I know the one i entered is correct? What is wrong?

After you file

To resolve this issue, please select everything that is in the SIN box and delete it. Then re-type your SIN, making sure to use only numbers and no special characters or spaces. There should be a total of 9 numbers. Ex: 123456789

 

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