1 The phase usually lasts up to 10 minutes.  You will be in light sleep in the second stage of a non-REM sleep. Your heart rate will come down and so will your body temperature. You will soon enter deep sleep phase.
Keep records for 3 years from the date you filed your original return or 2 years from the date you paid the tax, whichever is later, if you file a claim for credit or refund after you file your return. Keep records for 7 years if you file a claim for a loss from worthless securities or bad debt deduction. Keep records for 6 years if you do not report income that you should report, and it is more than 25% of the gross income shown on your return. Keep records indefinitely if you do not file a return.
1. You owe additional tax and situations (2), (3), and (4), below, do not apply to you: Keep records for three years. 2. You do not report income that you should report, and it is more than 25% of the gross income shown on your return: Keep records for six years. 3. You file a fraudulent return: Keep records indefinitely.