Using Javascript
Use document.getElementById to do this part.
The IRS 1040 EZ form is for people with no itemized deductions filing as single or married couple. The deduction is calculated based on these rules: If someone can claim you as depend on their return, then the deduction is 3900 for single and 6550 for married; otherwise the deduction is 6550 for single and 11800 for married. The taxable income is computed by the formula: taxable income = total income – deduction. The tax is calculated based on the filing status and taxable income. The tax rate schedules for single filing status are:
If the taxable income is
|
At least |
But less than |
Tax |
|
0 |
22100 |
15% of the taxable income |
|
22100 |
53500 |
3315+28% of the amount over 22100 |
|
53500 |
115000 |
12107+31% of the amount over 53500 |
|
115000 |
250000 |
31172+36% of the amount over 115000 |
|
250000 |
79772+39.6% of the amount over 250000 |
The tax rate schedules for married couple filing a joint return are:
If the taxable income is
|
At least |
But less than |
Tax |
|
0 |
36900 |
15% of the taxable income |
|
36900 |
89150 |
5535+28% of the amount over 36900 |
|
89150 |
140000 |
20165+31% of the amount over 89150 |
|
140000 |
250000 |
35928.5+36% of the amount over 140000 |
|
250000 |
75528.5+39.6% of the amount over 250000 |
Test your program with these inputs:
(1) Single, total income 75000 and is a dependent of some people. The tax should be 17563.
(2) Married, total income 95000 and is not a dependent. The tax should be 18499.
Validation requirement: The total income must be between 0 and 500,000.

Dear Student ,
As per the requirement submitted above , kindly find the below solution.
Here a new web page with name "tax.html" is created, which contains following code.
tax.html :
<!DOCTYPE html>
<html lang="en">
<head>
<!-- title for web page -->
<title>1040EZ Form Tax Calculation</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- <script> is used for Javascript -->
<script src="tax.js"></script>
</head>
<body>
<h4>1040EZ Form Tax Calculation</h4>
Name :
<!-- textbox form name -->
<input type="text" id="txtName"/>
<br><br>
Filling Status :
<!-- radio button for filling status -->
<input type="radio" name="fillingStatus" id="single" value="Single"/>Single
<input type="radio" name="fillingStatus" id="married" value="Married"/>Married
<br><br>
Total Income :
<!-- textbox for total income -->
<input type="text" id="txtTotalIncome"/>
<br><br>
<!-- checkbox to display claims -->
<input type="checkbox" name="chkClaims"/>
Check this box if someone claims you on their return
<br><br>
<!-- textbox to display deductions -->
Deduction:<input type="text" id="txtDeduction"/>
<br><br>
<!-- textbox to display taxable income -->
Taxable income:<input type="text" id="txtTaxableIncome"/>
<br><br>
<!-- textbox to display tax -->
Tax:<input type="text" id="txtTax"/>
<br><br>
<!-- button to call function -->
<input type="button" value="Compute Tax" onclick="calculateTaxAndIncome()"/>
</body>
</html>
*************************
tax.js :
//function to calculate tax
function calculateTaxAndIncome()
{
var claimsAmount=0;//declaring variale to store claim amount
//get name
var name=document.getElementById("txtName").value;
//get total income
var incomeTaxAmount=parseInt(document.getElementById("txtTotalIncome").value);
//checking if checkbox for claim is checked
if(document.getElementsByName("chkClaims")[0].checked && document.getElementById("single").checked)
{
//if having dependent for single tax payer
claimsAmount=3900;//set claim
}
else if(document.getElementsByName("chkClaims")[0].checked && document.getElementById("married").checked)
{
//having dependent for married tax payer
claimsAmount=6550;//set claim
}
else if(document.getElementById("single").checked)
{ //no dependent but single tax payer
claimsAmount=6550;//set claim
}
else if(document.getElementById("married").checked)
{ //no dependent but married tax payer
claimsAmount=11800;
}
//checking total income
if(!(incomeTaxAmount<0 || incomeTaxAmount>500000))
{
incomeTaxAmount=incomeTaxAmount-claimsAmount;
//declaring variable to store income tax
var totalTax=0;
//checking which radio button is selected
if(document.getElementById("single").checked)
{
//checking incomeTaxAmount
if(incomeTaxAmount>0 && incomeTaxAmount <22100)
{
totalTax=incomeTaxAmount*0.15;
}
//if income is between 22100 and 53500
else if(incomeTaxAmount>=22100 && incomeTaxAmount <53500)
{
//tax is 28%
totalTax=3315+(incomeTaxAmount-22100)*0.28;
}
//if income is between 53500 and 115000
else if(incomeTaxAmount>=53500 && incomeTaxAmount <115000)
{
//tax is 31%
totalTax=12107+(incomeTaxAmount-53500)*0.31;
}
//if income is between 115000 and 250000
else if(incomeTaxAmount>=115000 && incomeTaxAmount <250000)
{
//tax is 36%
totalTax=31172+(incomeTaxAmount-115000)*0.36;
}
else if(incomeTaxAmount >250000)
{
//tax is 39.6%
totalTax=79772+(incomeTaxAmount-250000)*0.396;
}
}
//if married radio button is selected
else if(document.getElementById("married").checked)
{
//checking incomeTaxAmount
if(incomeTaxAmount>0 && incomeTaxAmount <36900)
{
totalTax=incomeTaxAmount*0.15;
}
//if income is between 36900 and 89150
else if(incomeTaxAmount>=36900 && incomeTaxAmount <89150)
{
//tax is 28%
totalTax=5535+(incomeTaxAmount-36900)*0.28;
}
//if income is between 89150 and 140000
else if(incomeTaxAmount>=89150 && incomeTaxAmount <140000)
{
//tax is 31%
totalTax=20165+(incomeTaxAmount-89150)*0.31;
}
//if income is between 140000 and 250000
else if(incomeTaxAmount>=140000 && incomeTaxAmount <250000)
{
//tax is 36%
totalTax=35928.5+(incomeTaxAmount-140000)*0.36;
}
else if(incomeTaxAmount >250000)
{
//tax is 39.6%
totalTax=75528.5+(incomeTaxAmount-250000)*0.396;
}
}
//display details
document.getElementById("txtDeduction").value="$"+claimsAmount.toFixed(2);
document.getElementById("txtTaxableIncome").value="$"+(incomeTaxAmount).toFixed(2);
//display tax
document.getElementById("txtTax").value="$"+totalTax.toFixed(2);
}
else
{
//alert user
alert("Enter total income between 0 to 500000");
}
}
======================================================
Output : Open web page tax.html in the browser and will get the screen as shown below
Screen 1 :tax.html

Screen 2:showing details for single person with dependent

Screen 3:showing details for married person with no dependent

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.
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