Form R-10606 Supplemental Worksheet for Credit for Taxes ... 2026

1. Click ‘Get Form’ to open it in the editor.
2. In Column 1, enter the abbreviation for the state where you earned income. This is essential for identifying the source of your income.
3. For Column 2, input the income earned in that state, which should match what was reported on your return filed with that state.
4. Calculate the ratio of income earned in Column 3 by dividing the amount in Column 2 by your total Louisiana taxable income. Round this percentage to two decimal places.
5. In Column 4, enter deductions attributable to other states by multiplying your total deductions by the ratio from Column 3.
6. Column 5 requires you to subtract the amount in Column 4 from Column 2 to find your tax table income attributable to other states.
7. Calculate the ratio of tax table income in Column 6 by dividing the amount in Column 5 by your total Louisiana tax table income and rounding it appropriately.
8. For Column 7, multiply the ratio from Column 6 by your Louisiana income tax found on Form IT-540 or IT-541.
9. Enter your net tax liability paid to other states in Column 8 as reported on that state's return.
10. Finally, determine your credit for taxes paid in Column 9 by entering the lesser of Columns 7 or 8 for each line.

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