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.
If you owe additional taxes, keep records for 3 years. If you do not report income that should have been reported, and it exceeds 25% of the gross income on your return, keep records for 6 years. If you file a fraudulent return, keep records indefinitely. If you do not file a return, keep records indefinitely. If you file a claim for credit or refund after filing your return, keep records for 3 years from the filing of the original return. If you file a claim for a loss due to bad debt deduction or worthless securities, keep records for 7 years. Keep all employment records for at least 4 years after the tax is due or paid. Some business records should be kept permanently: Audit ...