CT Scanners. Usually this instrument is used in the medical field, but it is also used in paleontology. In paleontology these are used to identify the reptiles and animals that are found in rocks without actually cracking the rocks.
4. You do not file a return: Keep records indefinitely. 5. You file a claim for credit or refund after you file your return: Keep records for three years from the date you filed your original return or two years from the date you paid the tax, whichever is later. 6. You file a claim for a loss from worthless securities or bad debt deduction: Keep records for seven years. 7.
There is no time frame for the IRS to access tax and tax records must be kept indefinitely if you do NOT file a tax return, OR you file a fraudulent tax return. You must keep records for 7 years if you file a claim for a loss from worthless securities or bad debt deduction. You must keep all employment (payroll) tax records for at least 4 years after the date the tax becomes due or is paid, whichever is later. Click here for a detailed payroll record retention schedule.