Instructions for Form 6251- 2014 Tax Year Checklist
Form 6251 determines whether the alternative minimum tax applies for the 2014 tax year by
recalculating taxable income under a parallel tax system using adjustments, preferences, exemptions, and AMT tax rates. AMT applies only when the tentative minimum tax exceeds the regular tax liability, requiring a comparison and reporting any resulting tax on Form 1040 or
Form 1040NR.
This checklist provides a mechanics-focused guide for completing the AMT computation using correct 2014 line references, exemption amounts, and tax rate thresholds while avoiding common placement and classification errors. It supports taxpayers and tax professionals working with itemized deductions, capital gains, incentive stock options, and other
AMT-sensitive tax return items.
Before You Start: Gather Required Inputs
Before preparing the AMT computation, ensure access to the completed 2014 Form 1040 or
Form 1040NR, including Schedule A, Schedule D, and supporting schedules affecting taxable income and deductions. Accurate AMT results depend on consistent source data from the regular tax return because adjustments modify reported amounts rather than rebuilding income independently.
Documentation should include state and local tax deductions, home mortgage interest details, depreciation schedules, passive activity workpapers, net operating loss calculations, and specified private activity bond interest statements. These records support tax preference entries that directly affect Alternative Minimum Taxable Income and the tentative minimum tax calculation.
Step-by-Step Checklist for Form 6251 (2014)
Step 1: Start with the correct base amount on line 1
Form 6251 line 1 begins with taxable income from Form 1040, and the correct starting line depends on whether Schedule A itemized deductions were claimed for the 2014 tax year.
Following the line 1 instructions precisely is essential because starting from an incorrect Form
1040 line misstates the alternative minimum taxable income and distorts later AMT calculations.
Step 2: Apply itemized deduction add-backs in Part I
Part I adjustments require adding back certain itemized deductions disallowed under alternative minimum tax rules, including state and local taxes deducted on Schedule A. Each add-back must be entered on its designated line to preserve proper classification within the AMT computation framework.
Step 3: Compute the home mortgage interest adjustment on line 4
Line 4 addresses differences in home mortgage interest and requires completing the worksheet in the 2014 instructions when Schedule A mortgage interest deductions were claimed. This adjustment applies when debt fails to qualify as acquisition or improvement debt for AMT purposes, requiring accurate tracing of loan proceeds.
Step 4: Enter net operating loss adjustments on lines 10 and 11
Regular tax net operating loss deductions are entered on line 10 using the Form 1040 amount, followed by the computation of the alternative tax net operating loss deduction on line 11. The
ATNOLD is generally limited to 90% of alternative minimum taxable income before the deduction, subject to statutory exceptions.
Step 5: Report passive activity differences on line 19
Passive activity income or loss must be recomputed under AMT rules when Form 8582 limitations apply, reflecting differences from regular tax treatment. The resulting difference between AMT and regular tax passive activity amounts is entered on line 19 as instructed.
Step 6: Include specified private activity bond interest on line 12
Interest from specified private activity bonds exempt from regular tax is treated as a tax preference item and reported on line 12. This amount must be reduced by allowable deductions related to the interest, but never below zero, in accordance with the 2014 instructions.
Step 7: Apply depreciation adjustments on line 18
Depreciation differences for assets placed in service after 1986 are handled on line 18 using
AMT depreciation methods described in the instructions. Maintaining separate AMT depreciation schedules is necessary because AMT basis differences affect future dispositions and net operating loss calculations.
Step 8: Compute AMTI and apply the exemption on line 29
After completing lines 1 through 27, line 28 reflects the alternative minimum taxable income before the AMT exemption is applied. The exemption amount is entered on line 29 based on filing status and reduced by applicable phaseout thresholds for the 2014 tax year.
Step 9: Calculate tentative minimum tax using 2014 AMT rates
Tentative minimum tax is computed using the two-tier AMT tax rate structure shown on the form rather than regular tax brackets tied to filing status. Taxpayers with capital gains or qualified dividends must complete Part III when required and carry the computed result back to line 31.
- Full IRS transcript retrieval (Wage & Income + Account)
- Professional tax form review
- Preparation & filing support
- Tax relief options if you owe the IRS
Step 10: Compare the tentative minimum tax to the regular tax and
determine the AMT
After subtracting any allowable AMT foreign tax credit, the tentative minimum tax is compared with the regular tax computation on the comparison line. Any positive difference represents alternative minimum tax owed and is reported on the appropriate Form 1040 line for the 2014 tax year.
ACA Reminder for 2014 Filings
Affordable Care Act individual shared responsibility provisions for 2014 are handled separately from alternative minimum tax calculations and do not appear in the AMT computation workflow.
Minimum essential coverage determinations, exemptions, and shared responsibility payments are reported through Form 1040 and Form 8965.
Treating ACA coverage issues as AMT adjustments is incorrect and can result in misreported tax liability under federal law. The AMT calculation should be limited strictly to statutory adjustments, preferences, exemptions, and rate structures.
Quick Accuracy Check for 2014
Confirm that the starting amount uses the correct Form 1040 line based on Schedule A filing status, and that exemption amounts are entered only on the exemption line. Ensure depreciation, net operating losses, passive activities, and private-activity bond interest are reported on their designated lines in accordance with the 2014 instructions.
Verify that the tentative minimum tax is calculated on the correct tax line, the regular tax comparison is completed on the comparison line, and the final AMT is carried to the proper
Form 1040 line. Consistent line usage and adherence to 2014 thresholds help prevent overstated AMT liability and support accurate tax return preparation.
If you’re missing tax documents or want to ensure the numbers you enter match IRS records, we can help.
