1) Click Transactions at the top of the screen 

2) You can sort by any header at the top, or you can search a specific transaction by using the search bar on the right hand side of the screen. 

3) Select the transactions you wish to change. you can select more than one transaction.

4) At the bottom of the screen you can change the category and the VAT rate. If you only wish to change the category please select NO CHANGE as the VAT rate