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.
1 Typically, the IRS can come after your business for failing to report income for up to 6 years after your filing if the amount is greater than 25% of your businessâs gross income. 2  If you filed for a deduction for a bad debt or worthless security, the IRS suggests you keep your supporting tax records for 7 years. Excluding employment tax records, files relating to current employees should be retained while they are working for you and at least 7 years after a current or former employee has left or been terminated. 2  For any job applicants who were not eventually hired, keep these files for at least 3 years.