Itemized Deductions 2020 Checklist
Overview of Schedule A for Tax Year 2020
This reference guide explains how Schedule A (Form 1040) works for tax year 2020 and how
itemized deductions are properly claimed under the rules in effect for that year. The guidance reflects TCJA-era changes applicable to 2020, including suspended deductions, capped limits, and revised eligibility standards. The goal is to help you understand what qualifies, what documentation is required, and how each deduction category fits together on Schedule A.
Schedule A allows you to claim itemized deductions instead of the standard deduction when total allowable expenses exceed the standard amount for your filing status. Several items commonly confused with itemized deductions, including stimulus payment reconciliation and unemployment exclusions, do not attach to Schedule A and should not be included when completing this form.
Understanding Schedule A for Tax Year 2020
Schedule A for 2020 reflects a narrower deduction framework than the pre-TCJA years.
Miscellaneous itemized deductions subject to the two-percent floor are suspended, and several deduction categories are capped or limited. Each line on Schedule A requires supporting records, and several deductions apply only after thresholds or special eligibility tests are met.
You must complete Schedule A accurately and attach it to Form 1040 or Form 1040-SR.
Schedule A itself is not signed, but it becomes part of the signed return. Careful organization of records before preparation helps prevent errors and ensures that claimed deductions withstand review.
Filing Status and Eligibility Considerations
Itemized deduction eligibility depends on both filing status and the return type filed. If you file
Form 1040, you use Schedule A (Form 1040) to calculate itemized deductions. If you file Form
1040-NR, itemized deductions are calculated on Schedule A (Form 1040-NR), which follows different rules.
Certain taxpayers may elect to be treated as U.S. residents for the year and file Form 1040 instead of Form 1040-NR. When that election applies, itemized deductions are figured on
Schedule A (Form 1040) using the rules described in this guide.
Ten-Step Checklist
Step 1: Confirm That Itemizing Is Appropriate
Review your filing status, age, and standard deduction amount for 2020. Compare the standard deduction to your estimated total itemized deductions. Itemizing applies only when allowable deductions exceed the standard deduction for the year.
Filing the correct return form is essential. Form 1040 filers use Schedule A (Form 1040), while
Form 1040-NR filers use Schedule A (Form 1040-NR) unless a valid residency election changes the return type.
Step 2: Collect Medical Expense Records
Gather receipts, invoices, and explanation-of-benefits statements for qualified medical, dental, vision, and long-term care expenses paid during 2020. Records should clearly show the amount paid, the service provided, and the payment date.
For 2020, only medical expenses exceeding 7.5 percent of adjusted gross income are deductible. Expenses below that threshold are not included on Schedule A, even when they otherwise qualify.
Step 3: Assemble State and Local Tax Documentation
Compile records showing state income taxes paid, local income taxes paid, property taxes, and qualifying personal property taxes. Acceptable records include W-2 withholding statements, payment confirmations, and property tax bills.
For tax year 2020, the state and local tax deduction is capped at $10,000 per return, or $5,000 if married filing separately. The cap applies to the combined total of all eligible state and local taxes.
Step 4: Gather Mortgage Interest and Property Records
Collect Form 1098 statements, mortgage loan documents, and property tax bills related to qualified residences. Documentation should support the amount of interest paid and identify the property securing the loan.
Only qualified residence interest is deductible, and the deduction may be limited. Limitations depend on loan balances, acquisition dates, and how loan proceeds were used, all of which require careful review of the Schedule A instructions.
Step 5: Substantiate Charitable Contributions
Maintain records for all charitable contributions, including cash, check, payroll deductions, and noncash gifts. Documentation should identify the organization, the contribution, and the amount or description of the donated property.
A contemporaneous written acknowledgment is required for each contribution of $250 or more.
Additional substantiation rules apply to noncash contributions and to contributions reported on
Form 8283.
Step 6: Evaluate Casualty and Theft Loss Eligibility
Determine whether any casualty or theft losses occurred during 2020 and whether they meet deduction requirements. Personal losses generally qualify only when attributable to a federally declared disaster during the applicable period.
An exception applies when personal casualty gains exist. In those cases, certain nondisaster losses may be deductible up to the amount of the gains, as calculated under Form 4684.
- Medical expenses exceeding the AGI threshold
- State and local taxes are subject to the annual cap
- Qualified home mortgage interest
- Charitable contributions meeting substantiation rules
- Eligible casualty and theft losses
Step 7: Calculate Allowable Deduction Totals
Calculate deductible amounts separately for each category after applying thresholds and caps.
Combine totals carefully to avoid double deductions or inclusion of nondeductible expenses.
Deduction categories may include:
Step 8: Confirm That No Overall Phaseout Applies
For tax year 2020, there is no overall income-based limitation on itemized deductions. The
Pease limitation is suspended for tax years 2018 through 2025.
No income-based reduction applies to total itemized deductions for 2020. You do not need to calculate or apply any overall phaseout amount when completing Schedule A for that year.
Step 9: Attach Form 8283 When Required
Attach Form 8283 when claiming noncash charitable contributions exceeding $500. Section A applies to contributions of oveof00 or more, but not more than $5,000 per item or group of similar items.
Section B applies to contributions exceeding $5,000 per item or group of similar items and generally requires a qualified appraisal and appraiser declaration. The completed form must be attached to the return.
- Miscellaneous itemized deductions remain suspended
- The SALT deduction is capped at $10,000 per return
- Medical expenses are deductible only to the extent they exceed 7.5 percent of AGI
- Personal casualty losses generally require a federally declared disaster
- No overall itemized deduction phaseout applies
- Full IRS transcript retrieval (Wage & Income + Account)
- Professional tax form review
- Preparation & filing support
- Tax relief options if you owe the IRS
Step 10: File the Return and Retain Records
Sign and date Form 1040 or Form 1040-SR after attaching Schedule A and any required supporting forms. Schedule A does not contain a signature line and should not be signed separately.
Retain supporting documents as long as they may be material to the return. While three years is often the case, longer retention periods may apply depending on the circumstances surrounding the return.
Schedule A Line Structure for 2020
Schedule A for 2020 includes lines 1 through 18. Medical and dental expenses appear first, followed by taxes paid, interest paid, gifts to charity, casualty and theft losses, other itemized deductions, and the total itemized deduction calculation.
Earlier versions of Schedule A included broader miscellaneous deductions and different casualty loss rules. The 2020 version reflects TCJA-era limitations, capped deductions, and clarified thresholds that apply specifically to that tax year.
Key 2020 Rule Highlights
The following points summarize critical Schedule A rules applicable to tax year 2020:
This checklist provides a complete, corrected framework for preparing Schedule A for tax year
2020. Careful documentation, accurate calculations, and adherence to year-specific rules ensure that itemized deductions are properly reported and supported.
If you’re missing tax documents or want to ensure the numbers you enter match IRS records, we can help.
