I paid $110 on card (linked to QB) and $20 with voucher.I can't match transaction with expense, because expense is $130 but transaction is $110. How can I enter voucher?

You can apply the voucher by adding it as a negative amount in another line item under the applicable category in the Expense tab, zzz.

Here's how:

1. Go to the Expense tab, then select Expenses.
2. Find the expense transaction you want to edit. Under the Action column, click on View/Edit.
3. In the second line item under the Category column, create an Account Name for the Voucher you'd like to add. To do this, click +Add new, choose the appropriate Account Type and Detailed Type, then hit Save.
   
4. Fill in the Description field and enter the negative value, which is -$20.00.
5. Once done, click Save and Close.

Now that you have applied the voucher, you can match the bank transaction to the updated expense account.

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