Hi,
Create a Multi-level method in AFAMS , there give Validity Start from Ordinary Depreciation Start Date.
Then create a New Depreciation Key and assign the multi-level method against the Depreciation Key and activate the Depreciation Key.
Then while creating Asset say the Asset is capitalized in October but Depreciation will be calculated from January then in Asset give Capitalization Date of October and give Depreciation start date as 01st January. As you have created Multi-Level method from Ordinary Depreciation start date, then system will calculate Depreciation for 10 months in retrospective effect for the month of October
Regards
Diptadhi