Form 15 g - can we use it to our advantage?

Dear friends,

I am in the 30% tax slab. 

And I also have an BANK FD of 15 lacs

Now, I have a question. Do I need to really submit form 15G?

If I don't submit, I know that by default TDS will be cut and at a rate of 10%.

However, if I submit the form 15G, the interest on FD (more than 1 lac) need to get added to my salary income and will be taxed at 30%.

So, I pay less tax (by TDS) if I dont submit the 15G form.

I don't know if my thinking is correct. please advise and correct me if I am wrong.

Thank you,

Avinash