Why can I not post to an account?

Please advise why I cannot post to a certain account.

The one “Fixed Assets, accumulated depreciation” as indicated on the attached…

Thank you.

Have you tried using the Depreciation Entries tab?

You can not post depreciation using journal entries

Read this Depreciate fixed assets | Manager

It also seems odd that you have multiple Fixed Assets at Cost accounts - this is not the usual way to account for Fixed Assets in Manager

Read this guide Purchase fixed assets | Manager
and this one Migrate fixed assets from prior accounting system | Manager if it is appropriate