When a substantially amended return is filed, from which filing may the three-year prescriptive period be reckoned?

When a substantially amended return is filed, from which filing may the three-year prescriptive period be reckoned?

• A. From the original return
• B. From the amended return
• C. From the date of discovery
• D. From the amended return only if it is substantially different and amounts to a new return; otherwise from original

Answer: (D)

The key idea is how prescription for tax assessment interacts with an amended return. If an amended return is truly substantially different and amounts to a new return, the three-year period restarts from the date the amended return is filed. If the amendment is not substantial and doesn’t create a new return, the clock continues from the original return’s filing date. This is why the correct rule is that the three-year period may be reckoned from the amended return only if the amendment is substantially different and amounts to a new return; otherwise it starts from the original filing date. A note: the date of discovery is not the trigger for the normal three-year limit in this context, and minor or clerical corrections typically do not restart the period.

The key idea is how prescription for tax assessment interacts with an amended return. If an amended return is truly substantially different and amounts to a new return, the three-year period restarts from the date the amended return is filed. If the amendment is not substantial and doesn’t create a new return, the clock continues from the original return’s filing date. This is why the correct rule is that the three-year period may be reckoned from the amended return only if the amendment is substantially different and amounts to a new return; otherwise it starts from the original filing date. A note: the date of discovery is not the trigger for the normal three-year limit in this context, and minor or clerical corrections typically do not restart the period.