Change the weight boxes. Diploma and some unis use 30-70 or 40-60.

Internal out of 40 but weight 20?

Type actual scored and actual max. Weight is the share in final, not the max marks.

Put 0. Final will look ugly. That is the point of seeing it early.

Board College

Weighted Internal External

Internal 20, external 80, one final number.

Type internal scored and internal max, external scored and external max, plus weights if not 20-80. Final is weighted sum scaled.

Formula used: final = internal% × w1 + external% × w2 (weights default 0.20 and 0.80)

This is an estimate. Your board formula may differ.

Weights not 20-80?: Change the weight boxes. Diploma and some unis use 30-70 or 40-60.
Internal out of 40 but weight 20?: Type actual scored and actual max. Weight is the share in final, not the max marks.
Missing internal?: Put 0. Final will look ugly. That is the point of seeing it early.