Keep a copy of your tax records

Remember to keep a copy of your completed income tax return. Retain copies of your return for at least seven years after you file your return. We may also ask you to refer to a previously filed tax return for verification purposes if you:

call us for information about your return,

create an Online Services account,

check your refund status, or

view your 1099-G information.

Also keep copies of any books, records, schedules, statements, or other related documents. The Tax Department may ask you to provide copies of these records after you have filed your income tax returns.