I have a 1099-K and QuickBooks they don't add up my quickbooks has my cash income square doesn't. everything else is entered through quickbooks. do I still enter square

Since QuickBooks has all of your income (including Square), I would first enter that Form 1099-K from Square. 

Then I would enter that remaining amount as cash income/receipts.

So, if QuickBooks says $100,000 income and Square has $50,000 in payments, you would enter the Form 1099-K for $50,000. 

Then enter $50,000 for cash receipts so your income will still show $100,000.