All employee deductions are company liabilities so the payment is a payment of the liability. This liability is already recorded in QB since you use QB payroll. A couple of ways to approach this, if tge liability shows in QB Payroll as unpaid, pay it (record the money movement) and match to the bank feed transaction. Or , starting with the feed item search for a match to find either the unpaid liability or the payment transaction made by QB on your behalf. 

Planning ahead, you will add employee match as a separate payroll item, which, when running payroll, will also become a payroll liability.  All payroll costs, including taxes, are posted on the date of payroll as accrued, even if you use cash basisvreporting