Deductions & credits

@CDinCA I see what you mean when I look at the actual form.  I had to override the $7,500 TurboTax "calculated" to $3,750.  They then put $3,750 in line 4a, 50% in line 4b, and $3,750 in line 4c. So the end credit is correct, but they didn't use the correct calculations to get there.  It should have been $7,500 in 4a and $3,750 in 4c.  Hopefully the IRS won't try to tell me I only should have gotten $1,875 and tell me I owe them the difference in about 6 months when they get around to reviewing returns.