Currently, you can set the fiscal year at the account level. This makes sense if all product lines and products will fall under the same company. But it does not make sense when you're managing products for multiple companies within the same Aha! instance. So it would be great if we could override the account-level fiscal year at the product line or product level.
As noted, it is currently possible to set a custom fiscal year at the account level.
Given the current capabilities and historical support for this idea, we are unlikely to add the ability to manage fiscal years at the product or product line level. We hope you can understand.