How to constraint a sum so that the inputs do not exceed the total entered previously?

[Kal_Lam]

You could do this as outlined in the post discussed previously:

How to validate totals against sum of sub categories in Kobo?

@bizaheran, you could do it as outlined in the image shared below: In the survey tab of your xlsform: [Image 1] Data entry screen as seen in Enekto: when the number tries to exceed [Image 2] Data entry screen as seen in Enekto: when the number matches [Image 3] Reference xlsform: SLL_Form.xlsx (14.6 KB)