Running a small business. Tax Queries??

Hi All,
I am very new to this forum.
 
I writing this post since I have some queries related to TAX.
 
My wife is running a small business and following is the business descriptttttion.
 
She is basically a web developer and she get projects from various media.  She rented a small place and she employed 4 resourses.  She is paying around INR 5,000/- per month for each employee.

- Profession tax registration required, deduct PT from employees and submit.
 
She started this firm on last year.  The annual turnover is around INR. 5,00,000/-.  She is having a bank account in her name  (personal) and all the money are pooling into that account. She is also having a PAN card on her own name.

- Income return should be submitted after calculating Profit and Gains of business and profession 
 
The firm is not yet registered and we are trying to register under RoC

- Single owner can not form a firm/ company, get an certificate of enlistment from local municipal body at your business address ( trade licence)
 
Following are my queries:
 
1.  Does she need to pay TAX? (Obviously yes)

- yes, she has to pay a) profession tax, income tax, and above 10L service tax

2.  For what amount she need to pay TAX?  For the turnover or only on the profit?

- for service tax, gross turnover, for incometax , on net profit only 

3.  What is the percentage she need to pay as TAX?

- as per tax slab it valies 0-30%

4.  Does she pay TAX as an Individual or as a Firm?

- as an individual  

Need your advice on this.
 
Thanks & Regards
Malai