The terms of your engagement is the criteria for determining whether you are an employee or a professional. If the tax is deducted @ 10% u/s 194 J, you are an independent professional and your income will be assessable under the head Profits and gains from business or profession. In such case you can opt for offering your income u/s 44ADA. 50% of the gross receipts (net of Service tax/GST, if any) needs to be offered as income from such consultancy services. There will not be any additional claim for expenditure. As you are most likely to be carrying on this consultancy service as a proprietor, your tax liability will depend upon the slab applicable to you. Thus if your income is between Rs 2.5 Lakhs to R 5 lakhs, it will be 10%, if it is between Rs 5-10 Lakhs, it will be 20%+Rs 25K and if it is above Rs 10 L, the tax will be @ 30% on the excess over 10L+Rs 1.25 L. In addition, you will have surcharge @ 3% on your income.
On the other hand, if you are treated as an employee, it becomes the responsibility of your employer to deduct tax as applicable to you.