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.
For most people, that means keeping your tax records for at least three years from the date you actually filed your tax return. Some states have a longer statute of limitations. In that case, you should keep your tax records for as long as the statute of limitations is still open for a particular tax return. The statute of limitations gives the IRS three years to audit your tax return.