Quote from omnibrad:
That is correct. You cannot exceed 9,999,999.99 in any field in TurboTax. What I did was enter a bogus proceeds total on the Schedule D in TurboTax (but correct gain/loss), then attached the brokerage D-1. Then, I downloaded the Schedule D pdf from irs.gov and filled in all the fields including the correct value for proceeds. I replaced TurboTax's Schedule D with the manual one.
Concerning importing transactions into TurboTax, there is a limit of 3000 transactions that can stop you. So, that's another reason to use the brokerage generated D-1 instead of importing. The brokerage D-1 took care of wash sales, so it was easier that way.
thank you for the informative detailed post. So did you end up paper-filing or were you able to send all that in electronically? I wonder what the IRS would think if you did a mix (i.e. e-file but then send in supporting docs via snail-mail)?