Shortened Fiscal year

Hi All

I'd like to know what the challenges/issues or testing scenarios needed in all modules in case of shortening the fiscal year. The current fiscal year is Calendar-based and we want to shorten to Oct and start a new FY Nov-Oct... We are in 4,6c. I have already verified OSS note 672255..

Any valuable documents/inputs will be highly appreciated.

Thanks & Regards

S Jayaram