preveous earning - additional components in 1 month payslip

[vet]

Guys, Really need some help here. I have few questions on preveous earnings. My march Month payslip has a lot of additional components. Below is the sample format of my March month's Pay slip.
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Earnings Rs.
BASIC DA = 1000
HRA = 500
CONVEYANCE = 500
BASKET ALLOWANCE = 3000
INCENTIVE BONUS PLAN = 2000
UNCLAIMED MEDICAL TAXABLE = 500
UNCLAIMED LTA TAXABLE = 500

Total Earnings = 8000
------------------------------------------------------------
----------------------------------------------------------
Deductions Rs.
PF = 200
Professional tax = 200
Income Tax = 200

Total Dedections = 600
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Net Pay(Earning-Deduction) = 7400

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Here are my questions,
1) Should I submit any additional proof for confirming that the "Basket Allowance","incentive","medical","LTA" are part of my salary package?

2) If I am considering my Gross Salary, should i submit any proof for "PF", "professional Tax", "Income tax".

3) I can submit the Income tax Return Statement. But it covers only till the last financial year end (March 31 2010). What proof I can show for the months after March?

Thanks in advance.

[layman]

1) Should I submit any additional proof for confirming that the "Basket Allowance","incentive","medical","LTA" are part of my salary package?

Not required

2) If I am considering my Gross Salary, should i submit any proof for "PF", "professional Tax", "Income tax".

Not required

3) I can submit the Income tax Return Statement. But it covers only till the last financial year end (March 31 2010). What proof I can show for the months after March?

Payslips and bank statements showing net salary deposited
Thanks in advance.

[vet]

Thanks for your reply. So, payslips,Bank Statement, ITR-1 is all we need for gross salary proof?.
While reading some of the old threads, some members have posted that they have observed some ECO's tries their best to reject applications who are able to score only 75 points . I am in that Category . So, i wanted to make sure that I submit best possible supporting evidences that helps my application to go through.