Deduction. u/s 194 j is treated as professional , if 26as total of 194j and 44 ADA rows no not match, you will get mismatch notice.
So in all 194 j cases its better to calculate the income as professional income under 44ADA and not 44AD.
Though the currenct situation is some professionals that are not included in the list of professionals under 44 ADA are not clear on this issue, for example anyone offering coaching services may have deductions under 194j but is not under the list of professions prescribed for 44 ADA; similarly many IT professionals run business of supplying SaaS. This is grey area that the Govt should clarify immediately