Form D1-XB "Business Income Tax Return Request for Extension ... 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering the tax year at the top of the form. This is crucial for ensuring your extension request aligns with the correct fiscal period.
3. Indicate whether you are filing as a Corporation or Partnership by selecting the appropriate option.
4. Fill in your business name, account number or FID#, and DBA (Doing Business As) if applicable. Ensure that all information is accurate to avoid processing delays.
5. Provide your address, including city, state, and zip code. This helps in identifying your business location for tax purposes.
6. Answer whether you filed a Dayton return last year by selecting 'Yes' or 'No'.
7. Complete the estimated income and tax due sections. Enter your estimated Dayton income subject to tax and calculate the tax due at 2.50%.
8. List any credits from prior years and estimated quarterly payments made to determine total credits available.
9. Calculate the balance of Dayton tax due by subtracting total credits from tax due.
10. Request an extension period by specifying the number of days needed until filing your return.
11. Sign and date the form, ensuring that both the Tax Preparer and Authorized Representative signatures are included if applicable.

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