If you are worried about Sales matching the 1099-K, then include it in Sales and deduct it somewhere. Otherwise the IRS matching program will kick out a discrepancy.

EG $1,000 gross sales and $66 sales tax collected. Is it $1,000 sales(the correct sales amount) or $1,066 sales less "expenses" of $66?

4 sales tax returns combined = $1,000, not $1,066.