If you are posting to a depreciation book for which depreciation does not have G/L integration, use the FA journal.
Open the Fixed Asset Journal window.
Fill in the fields in the journal line. For Help about a specific field, click the field and press F1.
Click Posting, Post to post the journal.
Posting Depreciation Manually by Using FA G/L Journals
Filling In and Posting FA G/L Journals
Calculating Depreciation Automatically
Viewing Depreciation Ledger Entries
Canceling and Recalculating Depreciation
Viewing FA Error Ledger Entries
Fixed Asset Depreciation Setup