ITR-How to validate without submission

Since my Form 10-IE issue is not yet resolved, I have prepared ITR-3 temporarily without availing benefit of sec. 115BAC. Now, I want to validate my ITR-3 but without submission, since, I have to change the ITR on resolution of Form 10-IE issue. I think, I can do so by deliberately making some 'Category A' error at the fag end and then make the validation so that now itself I can identify possible validation errors. What error I can deliberately make so that ITR-3 is not allowed to be submitted at all but other errors, if any, are exhibited?