Hi Aaron, give the following a try:
SELECT VCTD485.EXT_KEY1,
VCTD485.COMP_CAN_DT
From ASKME_CPNI_UNRESTRICTED_VIEWS.VCTD485 VCTD485
WHERE VCTD485.COMP_CAN_DT >= ADD_MONTHS( CURRENT_DATE , -13);
as info, here's where I found some posts that helped me provide this answer: community.teradata.com/.../73984
and here: http://forgetcode.com/Teradata/1616-Getting-Current-date-and-time