How many years can a taxpayer go back to request a change to a previously filed tax return using the form T1-ADJ? O 3 years O 10 years O 12 years O 15 years Mark for follow up >

How many years can a taxpayer go back to request a change to a previously filed tax return using the form T1.ADJ? 3 years 10 years 12 years 15 years Mark for follow up