Can i change tax?, some items on the reciept do not have tax, therefore I would like to know how to manually change the amount of tax when recording my transaction

This is the screen I get. I am using Quickbooks Online

If you're looking to change/add tax on the page you're on (according to the screenshot you sent), you'd need to click on the field which says, Select GST/HST. I've attached a screenshot below: 

Let me know if this helps. If not, I recommend locating the transaction if it's already recorded in QuickBooks and changing the taxes from there. Let me know which transaction you're working with and I'll be glad to walk you through adding/adjusting the tax. 

For future reference, QBO has great resources which provide tips and tricks on using the program. I suggest checking them out here. Otherwise, feel free to ask questions. :)

This is the receipt that I am trying to match to my bank feed. The tax is only on specific items

I appreciate you sending the screenshot. I want to make sure I'm on the same page as you. You are looking to enter the items on that receipt separately in QB? Could you send me a screenshot of the transaction in QB?

Thanks, here is the screen shot 

What happens when you add the transaction to QB by clicking the Add option and manually open the transaction to edit? You can locate the transaction by clicking Sales > Expenses > locate the expense you just added > adjust the total amount and the tax amount. Let me know if you need help.