This feature is available only in Premium and Ultimate pricing plans.
Only Admins can update the numbering sequences.

Similar to setting the Custom Invoice Number Format, you can now set up a General Number Scheme for other items as well.

To do so, head over to Settings - General:

And navigate to the Numbering scheme menu where you can set custom sequences for projects, budgets, and tasks:

To see which variables are supported when creating a custom sequence, hover over the ℹ️ icon next to each item:

You can also use standard text along with the predefined variables.
For example, Task-{n}, Project-{yy}, etc.

Please note that there is no option for setting up a numbering sequence that will follow the number of your choice, i.e. there is no option that a sequence starts from, for example, 123.

💡 A task sequence cannot contain the 'company_code' variable