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.
The IRS recommends keeping records for â3 years from the date you filed your original return or 2 years from the date you paid the tax, whichever is later.â You should also keep records for three years if you owe additional tax and the situations described in sections 3 and 4 below donât apply.f you file a return and claim a loss from worthless securities or take a deduction for a bad debt, you should keep your income tax papers for seven years.