How to Avoid Mistakes in the 2026 Tax Filing Process: 7 Key Tips for Your Company in Chile

Keeping your information up to date is essential for effective communication with the SII; otherwise, you may not receive notifications regarding this and other processes.

What to do?

• Verify that your address is correctly recorded.
• Update your contact information—email and phone number—to receive information, alerts, and/or notifications.

Practical tip: Additionally, confirm that your economic activity matches the business you operate.

Keeping all your financial and tax information organized can make all the difference in avoiding errors or delays.

What Chilean or foreign documents might be essential?

• Certificates of dividends, interest, or capital gains.
• Receipts for the purchase and sale of stocks, funds, or other financial assets.
• Real estate purchase documents.
• Contracts and payments received for property rentals.
• Bank statements for checking or investment accounts.

Practical tip: If you are a taxpayer with investments both in Chile and abroad, it is helpful to organize your information in an Excel spreadsheet where you record all your income and its country of origin, as well as associated expenses and taxes paid. This makes it easier to prepare your tax return and verify data.

This new SII platform allows you to:

• It offers centralized access to information on income, expenses, deductions, and carryover balances.
• The system applies a preventive correction, identifying potential errors before the tax return is filed, which allows taxpayers to make adjustments in advance, avoiding issues or problems during filing.
• It provides taxpayers with complete data based on information from your sales and purchase records, as well as your own and third-party tax returns, thereby ensuring data accuracy.

Practical tip: Once the information is organized, verify that it matches the data proposed by the Internal Revenue Service.

As a Chilean resident, you must report all income and earnings received during the year 2025, both in Chile and abroad. What should I include?

• Salaries or fees received.
• Dividends and interest generated by investments.
• Income from property rentals.
• Capital gains from the sale of assets (stocks, funds, and real estate, among others).

Practical tip: Check if you can claim “credits for taxes paid abroad,” considering whether the country of origin has a Double Taxation Avoidance Agreement (“DTAA”) with Chile.

There are various tax benefits that can reduce your tax burden, What are these benefits? Some examples:

• Deductions for education expenses for your children.
• Deduction for mortgage interest on properties in Chile.
• Use of the Foreign Tax Credit to avoid double taxation.
• Application of the Substitute Tax on Passive Income if eligible, to regularize undistributed profits from foreign investments.

Practical tip: Carefully review Form 22 and its codes for reporting these benefits. Consult with your accountant and/or tax advisor to identify all applicable deductions.

If you are a taxpayer who owns assets outside of Chile, you must comply with the reporting requirement established by the SII.

What should I report and how?

• Bank accounts, financial investments, real estate, and other assets abroad.

• File Affidavit No. 1929, which is due by June 30, 2026.

Practical tip: Complete this process in advance to avoid errors or unnecessary fines; failure to declare assets can result in fines of up to 100 UTA (approximately $6,000,000) and additional audits by the SII.

Use the SII’s tools to preview the results of your tax return.

Why is this useful?

• It allows you to verify the data pre-filled by the SII and confirm its accuracy, giving you the opportunity to detect inconsistencies.
• You can also see the impact of including foreign income and calculate applicable tax credits.

Practical tip: Run simulations well in advance and adjust your return if you find errors in the pre-filled data.