Budget
What you meant each category to cost, against what it actually did. Set it once and it carries forward, so every month is judged against the figure that was in force while it was running.
No budget for February 2026 yet
Set a limit on any category and it applies from this month onwards. Each box is already showing what that category has actually been costing you, so the quickest start is to fill them all in and then argue with the two or three that are wrong.