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I am reporting what appears to be a calculation bug in TurboTax’s implementation of IRS Form 5695, specifically for lines 19a through 19h for energy‑efficient exterior doors.   Per the IRS Form 5695 instructions, the credit for qualifying exterior doors should work as follows: Line 19a: Cost of the most expensive qualifying door Line 19c: 30% of line 19a, capped at $250 Line 19d: Cost of the two next most expensive qualifying doors Line 19e: Cost of all other qualifying exterior doors Line 19f: Sum of lines 19d and 19e Line 19g: 30% of line 19f Line 19h: Sum of lines 19c and 19g, capped at $500 In my case, I have two qualifying exterior doors, each costing $2,795. TurboTax correctly populates: 19a = $2,795 19c = $250 (30% of 19a, capped at $250) 19d = $2,795 (second door) 19f = $2,795 (sum of 19d and 19e as shown on the form) However, TurboTax then fails to perform the required calculation on line 19g and does not compute the additional credit: Line 19g is left blank, even though the instructions say: “Multiply line 19f by 30% (0.30).” Line 19h remains at $250, even though it should be the sum of 19c and 19g, capped at $500. Based on the IRS instructions, with two qualifying doors, the correct result should be: 19g = $250 (30% of 19f, capped at $250) 19h = $500 (19c + 19g, capped at $500) I have attached a screenshot of the filled‑in Form 5695 from TurboTax showing: 19a = 2,795 19c = 250 19d = 2,795 19f = 2,795 19g = blank (should be 250) 19h = 250 (should be 500) This indicates that TurboTax is not applying the 30% calculation to line 19f and is therefore under‑calculating the allowed credit. Additionally: When I attempt to use line 19e (“all other qualifying exterior doors”) as a workaround, the correct credit is applied BUT, TurboTax Smart Check flags this as an error, insisting that the “second” and “third” door fields be used first. Because of this, I cannot use a manual workaround within the software without triggering errors. Using an “override” on the form is not an acceptable solution, because overrides prevent e‑filing. I need to e‑file my return, so I need TurboTax to perform the calculation correctly without overrides. Thank you for reviewing this. Can anyone tell if this was an update bug and if it will be fixed in the near future? I am aware that "overriding" the entry on the form section can allow me to proceed but this would not allow me to e-file my return. Furthermore, from what I have noticed from others, prior submitted returns have been getting rejected due to Form 5696 calculation errors. I would prefer to have Turbo Tax look into this and fix this "math bug."   I am using the TurboTax Deluxe Windows PC Desktop Version.