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Since Q1-26 and Q2-26 populate correctly but Q3-26 does not, the issue is likely specific to the Q3 lookup criteria or source range rather than Excel calculation itself.
Please check the following:
- Confirm that the quarter label is identical everywhere, for example Q3-26, with no extra spaces or different dash characters.
- Verify that the formula in column H includes the Q3-26 columns or rows. The lookup or SUMIFS range may currently stop at Q2-26.
- Check whether D6 contains a real Excel date or only text such as Jul.
- Use Formulas > Evaluate Formula on the affected cell to see which condition or lookup fails.
- If the formula was copied across, compare its references with a working Q2-26 formula and check for incorrect absolute references.
Could you share the formula from the affected column H cell, plus the month and quarter header ranges?
Thank you for your time