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 Three Year Rule. In general, you should plan to keep your tax records for three years from the date the return was filed, or from the due date of the tax return (whichever is later). If you filed your return early, itâs treated as being filed on the due date. An example of the three year rule.