In case of an wrongly-submitted clients VAT, MyData will not allow you to upload the clients Invoices. 
To correct this, follow these steps:
- Check if you have entered the passwords (password and secret code, NOT the username) in the settings under the basic registry data, which are issued by the accounting department.
- Go to the settings, unlock the interdependent data, and enter our VAT number when prompted for the code.
- Go to the client’s tab and make the desired correction.
