how did I enter a wash sale on my 1099-B, I cannot enter each sale individaully

[fanfare]

It depends on how many wash sales you have to report.

Enter the wash sales individually on Form 8949, then use the subtotal results on the bottom of that form (Line 2) to know how much to subtract which gives you the Schedule D line 1a totals. Be sure to NOT check the adjustments box in the summary window.
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Alternatively, if entry of Wash Sales is too tedious,
summarize and check the box for adjustments and enter the disallowed amount.
This summary will go on Schedule D Line 1b.
You will be making the mail-in election.
Note: only the wash sales details have to be mailed if you summarized wash sales.
You may want to get Pro Adobe Reader that lets you edit your 1099-B PDF and reduce it down to only wash sales.
It depends on how many wash sales you have to report.

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complain to your broker, ask them why they won't give you two selectable reports to import:
transactions with adjustments and,
transactions without adjustments.

@gb25