Understanding the 2018 Schedule A Tax Form
The 2018 Schedule A tax form, officially known as "Itemized Deductions," is a crucial document for taxpayers who choose to itemize their deductions instead of taking the standard deduction. This form allows you to list and claim various expenses that can lower your taxable income. Here's a comprehensive guide to help you understand and fill out the 2018 Schedule A tax form.
When to Use Schedule A
You should use Schedule A when your total itemized deductions exceed the standard deduction for your filing status. For the 2018 tax year, the standard deductions are:
- Single: $12,000
- Head of Household: $18,000
- Married Filing Jointly or Qualifying Widower: $24,000
- Married Filing Separately: $12,000
Commonly Itemized Deductions
Some of the most common expenses itemized on Schedule A include:

- Home mortgage interest (Form 1098)
- State and local income, sales, or property taxes up to $10,000
- Charitable contributions (Form 8283 for noncash contributions over $500)
- Medical and dental expenses exceeding 7.5% of your adjusted gross income (AGI)
- Certain business expenses (if you're self-employed)
Filling Out Schedule A
Here's a step-by-step guide to help you complete the 2018 Schedule A:
- Enter your name, Social Security number (SSN), and address as they appear on your Form 1040.
- List and calculate each itemized deduction using the appropriate lines and worksheets provided.
- Add up all your itemized deductions and enter the total on the designated line of your Form 1040.
- If you're self-employed, complete Form 1040 Schedule C first, then transfer the net profit or loss to Form 1040.
Important Considerations
Keep these essential points in mind while filling out your 2018 Schedule A:
- You can't deduct expenses that were reimbursed by your employer or insurance company.
- You must have receipts and documentation to support your claimed deductions.
- Some deductions, like medical expenses, have specific rules and thresholds.
- If you're self-employed, you can deduct 50% of your business meals and entertainment expenses.
Familiarizing yourself with the 2018 Schedule A tax form and understanding the itemized deductions you can claim will help you maximize your tax savings. Always consult the IRS instructions for the most accurate and up-to-date information. If you're unsure about any aspect of your taxes, consider consulting a tax professional.