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.
Keep for seven years. If you fail to report more than 25 percent of your gross income on your tax returns, the government has six years to collect the tax or start legal proceedings. So when it comes to determining how long to keep tax recordsâelectronic and paperâ we recommend seven years, just in case. Essential records such as birth and death certificates, marriage licenses, divorce decrees, Social Security cards, and military discharge papers should be kept indefinitely.