If you changed your bank account, submit its account number in MyTax by 11 NovemberTax Administration Bulletin, 11/9/2018
If your bank account has changed, you should log in to MyTax to let the Tax Administration know the new account number by 11 November 2018. Refunds will be paid on 11 December 2018. If you have not given us your bank account number, we pay you the refund through a paper-printed money order. This requires more time. You cannot give a bank account number by telephone.
MyTax also allows you to submit the bank account number of your underage child. Young people under 18 can also submit their own account number, by logging in to Mytax with a mobile certificate if they have one.