I don't believe that there is a place for that. You do have some options.
1) Do you have any inventory reports from a year ago? If so, you could take a "monthly" inventory report that was run each month and use excel to find items that did not show up in prior months.
2) If you think you have a report from a year ago that lists all the items that existed then (whether they had inventory qty or not), you can look at the short item number on the item master table (IMITM) for the list of items. If you can determine the biggest short item 12 months ago, you know that anything bigger than that was created in the last 12.
Note: Short item (IMITM) is a next number that JDE increments and assigns to each new number created in Item Master. There may be gaps if someone started a new item and then canceled or someone deleted an item, but it should be pretty sequential and reliable.
Going forward:
1) use a category code as a "begin date" that gets populated during item setup.
2) If #1 is not an option and you know you will want this in the future, use the short item number I mentioned above. Get a list of short item numbers now. Periodically, get a new list and add the new items to your existing list noting the date you did the update next to each item.
3) If #2 is too manual, create a table with the short item and a date. Run a job every day, week, month... that pulls all short items from item master greater than the largest in the table, dates them with a date and adds them to the table. Then you can run reports against that table getting detail from the item master as needed.
Good Luck,
Jer