Edit, Download, and Sign the Idaho State Tax Commission Form 42A 2023
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How do I fill this out?
To fill out this form, gather all necessary financial information for your company including property values, sales figures, and payroll data. Enter the details as specified in each section of the form. Ensure the data is accurate and computed to four decimal places where indicated.

How to fill out the Idaho State Tax Commission Form 42A 2023?
1
Gather financial data including property values, sales figures, and payroll data.
2
Enter inventories, real and tangible personal property at the beginning and end of the year.
3
Calculate total and average property, and rented property values.
4
Input gross sales, sales delivered or shipped to Idaho purchasers, services sales, and other business receipts.
5
Calculate and enter total wages and salaries and compute the Idaho apportionment factor.
Who needs the Idaho State Tax Commission Form 42A 2023?
1
Corporations transacting business in Idaho need this form to report by-company apportionment factors.
2
Companies using three-factor apportionment need it to show property values, sales, and payroll details.
3
Businesses required to complete Idaho Form 42 must include this form with their submission.
4
Accountants managing state tax filings for Idaho businesses need this form for accurate reporting.
5
Corporations with a Federal Employer Identification Number (FEIN) conducting business in Idaho need to file this form.
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What are the instructions for submitting this form?
Submit the completed Idaho Form 42A along with Form 42 to the Idaho State Tax Commission. Forms can be submitted through mail or electronically via the Idaho State Tax Commission’s online portal. For mail submissions, send to: Idaho State Tax Commission, PO Box 36, Boise, ID 83722-0410. For electronic submissions, visit tax.idaho.gov and follow the instructions for online filing. Ensure all required fields are accurately completed and included.
What are the important dates for this form in 2024 and 2025?
Important dates for this form in 2024 and 2025 include the submission deadlines that typically fall on April 15th for annual filings. Check the Idaho State Tax Commission's official website for any updates or changes to these deadlines.

What is the purpose of this form?
The purpose of Idaho Form 42A is to provide a detailed by-company apportionment factor breakdown for businesses operating in Idaho. It supplements the main Idaho Form 42, ensuring accurate reporting of property values, sales figures, and payroll data specific to each company. By completing this form, businesses can accurately compute their Idaho apportionment factor and fulfill their state tax obligations.

Tell me about this form and its components and fields line-by-line.

- 1. Name as shown on return: Enter the business name exactly as it appears on the tax return.
- 2. Federal Employer Identification Number (FEIN): Provide the FEIN number for the business.
- 3. Three-factor apportionment checkbox: Check if using three-factor apportionment.
- 4. Idaho Property: Includes owned property at original cost and rented property calculations.
- 5. Inventories: List inventories at the beginning and end of the year.
- 6. Real and tangible personal property: Report real and tangible personal property values at year start and end.
- 7. Total property: Calculate total property by adding specific lines and computing averages.
- 8. Idaho property percentage: Divide total property by the Form 42 line 8 total column.
- 9. Idaho Sales (Gross Receipts): Report gross sales, returns, allowances, and other business receipts.
- 10. Gross sales: Enter gross sales, less returns and allowances.
- 11. Sales delivered or shipped to Idaho purchasers: Include these sales figures.
- 12. Idaho throwback sales: Report any Idaho throwback sales.
- 13. Sales of services: Include sales of services.
- 14. Other business gross receipts: Report other business gross receipts.
- 15. Idaho sales percentage: Divide total gross receipts by the Form 42 line 15 total column.
- 16. Idaho Payroll: Detail total wages and salaries paid.
- 17. Total wages and salaries: Report total wages and salaries.
- 18. Idaho payroll percentage: Calculate by dividing total wages by Form 42 line 18 total column.
- 19. Total percentage: Sum percentages from property, sales, and payroll.
- 20. Idaho apportionment factor: Compute the final apportionment factor by using line 19 and dividing by the number of factors.
What happens if I fail to submit this form?
Failing to submit this form can lead to various penalties and delays in processing your state tax return.
- Penalties: You may incur penalties for late or non-submission.
- Delayed Processing: Your state tax return processing may be delayed.
- Inaccurate Tax Reporting: Failure to submit may result in inaccurate tax reporting and compliance issues.
How do I know when to use this form?

- 1. Transacting Business in Idaho: Your business is engaged in activities within Idaho.
- 2. Required State Tax Reporting: You need to report by-company apportionment factors for state tax purposes.
- 3. Using Form 42: You are completing the Idaho Form 42 and require detailed company breakdowns.
Frequently Asked Questions
What is Idaho Form 42A?
Idaho Form 42A is used to report by-company apportionment factors and must be included with Idaho Form 42.
Who needs to fill out Idaho Form 42A?
Corporations doing business in Idaho and requiring Idaho's state tax reporting must fill this form.
How can I fill out Idaho Form 42A?
Gather all necessary financial data, enter it as specified in each section, and ensure accuracy.
Can I edit Idaho Form 42A on PrintFriendly?
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How do I sign Idaho Form 42A on PrintFriendly?
Use the signature tool on PrintFriendly to add your signature, then download the signed form for submission.
What is included in Idaho Form 42A?
Sections on property, sales, payroll, and detailed instructions for completing the form.
How do I calculate the Idaho apportionment factor?
Divide line 19 by the number of factors for each company and add each company's Idaho percentage.
Where do I submit Idaho Form 42A?
Submit it along with Idaho Form 42 as per the instructions provided in the form's guidelines.
Why do I need Idaho Form 42A?
To accurately report by-company apportionment factors for state tax purposes in Idaho.
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