Hi,
I had the same issue, and fix was very quick and easy.
In my case it happened because Bank account name in Chart of Accounts was different from that in Payroll settings. So, payroll cheques would be posted in the different account.
To fix it, go to Gear Icon -> Payroll Settings -> Accounting, and then choose the correct bank account to be used. Save and close.
Then, using the Payroll section, open details of paycheque you are unable to match. Note the name of bank account that was used. In my case, it had wrong name.
Finally, go to the Chart of Accounts, and locate that account you identified in the step above. It would contain the balance/transaction for payroll cheque you are unable to match. To fix, mere these two bank accounts (i.e. the proper one with the one where unmatched payroll cheque was posted), i.e. merge this account with proper bank account. Merge can be done by giving account the same name. QBO will prompt you if you want to merge.
So, after merge is done, head to the Bank feed, and this paycheque will have its matching entry.
Alex.
