If you have wash sales, it gets more complicated since those adjusted transactions have to be itemized on Form 8949 and the summary totals adjusted accordingly.
If you have only a few, enter the wash sales 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.
The subtotals combined should agree with the grand totals on your 1099-B.
