Salary income and professional income

In your case, if the income from consultancy is one time and/or casual in nature, if it's for this year only, next year not happen then it needs to be considered as income from other sources.

However, if the income from consultancy is going to be substantial, every year and year after year, i.e regularly every year then such income shall fall under income from business and Profession and yoi can show u/s 44ADA.

So,in your case you can...

Dear Sir,

Yes, you can do, firstly, you should claim Income from salary as per Form 16 and thereafter claim Business and Profession Income under 44ADA (50% or more than as the case may be). Claim all deduction as well as i.e. Standard. 

This year only consultancy income, not for forthcoming year, so such income sec 44ada or other sources?