Get your taxes done using TurboTax
The form 3922 would come from the broker that handled the investment purchase and sale.
If you have ordinary income reported on your W-2 form from the stock sale, you don't need the form 3922 to enter the sale in TurboTax. Just enter the form 1099-B like you would for a stock sale, but adjust the gain reported by decreasing your gain reported on the form 1099-B by the amount of income reported on your W-2 for the ESPP share sales.
You will see an option to adjust your gain when you enter the form 1099-B as follows:
