I imported my Consolidated 1099 from TD Ameritrade it says Accrued market discount should not be 0 for 2 ETFs. When I try to enter a value, Turbo Tax won't let me. Help?

Turbo Tax opens the form for me to input into the "Sale includes a disallowed wash sale loss (code W). Amount (leave blank if all)" field in the "Capital Gain (Loss) Adjustments Worksheet".