Bro, I got the same problem. Took me 1 hour to go through with the support to figure out. After you end the proceed and cost basis, you should see the check box below "I need to adjust my total cost basis".
Fill in your wash sales at "I need to adjust my total cost basis", select the W (nondeductible loss from a wash sale) check box, that is how you enter your wash sales.
Good luck!
