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.
If a substantial amount of income is omitted from the return, the period is extended to six years. Many advisers suggest that you can dispose of tax records after seven years. But some tax records need to be kept longer. Copies of prior tax returns and elections they contain should probably be preserved indefinitely. Records supporting the cost basis in assets owned, such as buildings and long-lived equipment, should be retained until at least three years after the asset is disposed of.