You can ignore any transaction by tapping on the transaction and taping the 'Ignore' row. There are two options:
Ignore from Budgets : This will keep the transaction in your spending report but will ignore it from your budgeted spending. This is useful when you have a large ticket item you have saved up for (like purchasing a car or vacation). In such a case, you often don't want it to blow out your monthly budget, but still want to track the fact that you spent that money.
Ignore from Everything : This will ignore the transaction from all budget, spending and other reports. The transaction will still show up in your Transactions tab.
To find your ignored transactions, head over to the Spending tab in the mobile app and scroll to the bottom of the screen. Tap on the Ignored box and you'll be able to see those transactions!