The following 6 boxes are examples of when the direct deposit information can be entered into the system. The first box is an example of clean unaltered routing number and account numbers from line 21a of Form 1040. Box 2 is an example line 21a with altered or illegible entry. Box 3 is an example of line 21a with written-over characters that does not change the existing entry. Box 4 is an example of line 21a with handwritten routing number with a preprinted Account Number. Box 5 is an example of line 21a with a routing number and no account number. Box 6 is an example of line 21a with routing numbers or account numbers with characters outside the specified area.