Hi,
First of all ensure that the you have installed the modules providing this feature in community edition.

By default budget is part of enterprise edition and if you need the same in community you have to download and add/install the needed module in your odoo instance.

Community budget modules:
* https://apps.odoo.com/apps/modules/16.0/om_account_budget/
* https://github.com/OCA/account-budgeting/tree/16.0/account_budget_oca

You can download the modules from the above and add it in your odoo instance and install the application.

How To Enable Full Accounting Features In Odoo 16 Community Edition

Thanks

Thanks to both

I failed to clarify that I had installed this module

https://github.com/OCA/account-budgeting/tree/16.0/account_budget_oca

But I also saw that my question on stackoverflow was canceled

I'll try again

Thanks

Hi,

In Odoo, budget management capabilities are primarily available in the Enterprise Edition. 

Try the custom module,

https://apps.odoo.com/apps/modules/16.0/base_account_budget/

Hope it helps