Normally, there must be an accounting entry exist for each of the expenses you do in the business if you want to reconcile then. 

So, if you are not going to receive invocie from the vendors or it's miscelleneous expenses then directly create journal entry for those expenses. 

Where Expense account gets DEBITD and Vendor or Payable account gets CREDITED. Then you can reconcile auto / manually reconcile it with the payment entries you received in the bank statement. 

Because in the bank statement you received amount as you have paid it, so it will going to find all the credit entries against the payment you have done. 

Normally  Expense entries looks like 

Similarly if any taxes apply then it will be added in the debit side for the vendor bill. 

Now the payment entries

So, reconciliation always be done with the same account and opposite accounting effect entries.  In above case both entries have Payable account with debit and credit effect. So system will suggest you to reconcile it. 

When you reconcile entries how many things it will perform. 

• It will check for the vendor payment, if the payment is already created then it will link payment with related jounal item. So the payment entry and expense entry (or vendor bill entry) will be linked. 

• If payment is not created then it will first create payment and validate it and linked it with journal item and then linked it with expense entry (or vendor bill entry).

• Entries will be linked thourgh the reconciliation reference.