The TDS Slab is,

Upto Rs.150000 - No TDS (Nil)

From 150000 to 300000 - 10.3%(TDS rate)

From 300001 to 500000 - 20.3% (")

Above 500000          - 30.3% (")

For Ex: Mr.X Earning Rs.28000 per month. TDS sholud be 
deduct from his salary.

TDS Calculation:

RS.28000*12 = 336000
Upto Rs.150000 no TDS will be deducted.
So, 336000-150000 = 186000
its comes under 1st slab.
so, 186000*10.3% = 19158 (Which is for one year)

TDS deduction per Month is, 19158/12 = Rs.1596.5

The Net Salary of Mr.X is,

28000-1597 = Rs.26403/-

The TDS Slab is,

Upto Rs.150000 - No TDS (Nil)

From 150000 to 300000 - 10.3%(TDS rate)

From 300001 to 500000 - 20.3% (")

Above 500000          - 30.3% (")

For Ex: Mr.X Earning Rs.28000 per month. TDS sholud be 
deduct from his salary.

TDS Calculation:

RS.28000*12 = 336000
Upto Rs.150000 no TDS will be deducted.

Taxable amount up to 3lakh
so its come to First and second slab
          150000*10%=15000
And Next  36000*20%=  7200
          TAX      = 22200
    Add Edu.Cess3%=    666  
    Total         =  22866

TDS deduction per Month is, 22866/12 = Rs.1905.5

The Net Salary of Mr.X is,

28000-1906 = Rs.26094/-

The TDS Slab is,

Upto Rs.150000 - No TDS (Nil)

From 150000 to 300000 - 10%(TDS rate)

From 300001 to 500000 - 20% (")

Above 500000          - 30% (")

For Ex: Mr.X Earning Rs.28000 per month. TDS sholud be 
deduct from his salary.

TDS Calculation:

RS.28000*12 = 336000
Upto Rs.150000 no TDS will be deducted.
So, 336000-150000 = 186000
its comes under 1st slab.
so, 150000*10% = 15000
 (Which is for one year)

And Next  36000*20%=  7200
          TAX      = 22200                               
Add Edu.Cess3%=    666  
    Total         =  22866

TDS deduction per Month is, 22866/12 = Rs.1905.5

The Net Salary of Mr.X is,

28000-1906 = Rs.26094/-

Hullow mr Jagmohan and Manish Kumar both of your 
explanations are not correct. The question is lack of 
clarity. He didnt clear it as gross salary or Nett salary. 
The nett if exceeds 1,50,000 attracts tax. You pl note the 
basic exemption is 1,50,000. In addition to that exemptions 
under Section 10 and Chapter Vi were there. If planned 
correctly taking all the provisions into consideration a 
salried individual need not pay a single paisa if his nett 
income exceeds even 4,35,000/-Pl send your mail.id I will 
send you a Lay Man tax plan to avoid tax burden

New Tds rate on 1st Oct.2009 
(Edu, cess not applicable )

Upto Rs.160000 - No TDS (Nil)

From 160000 to 300000 - 10%(TDS rate)

From 300001 to 500000 - 20% (")

Above 500000          - 30% (")

For Ex: Mr.X Earning Rs.28000 per month. TDS sholud be 
deduct from his salary.

TDS Calculation:

RS.28000*12 = 336000
Upto Rs.160000 no TDS will be deducted.
So, 336000-160000 = 176000
its comes under 1st slab.
so, 140000*10%      = 14000
 (Which is for one year)

And Next  36000*20% =  7200
               
           TotalTAX = 21200  

TDS deduction per Month is, 21200/12 = Rs.1767

The Net Salary of Mr.X is,

28000-1767 = Rs.26233/-