Deductions & credits

If this makes it any easier. 

so just to clarify...

1. I did taxes through H&R Block can I still try and amend here to see if there will be any net change?

2. If there is no change I shouldn’t have to worry about amending and I can cancel?

3. How can I get started on amending here? Do I need to return my entire tax refund and the whole amount? Like withdrawing it from my bank. 
4. my tax preparer said I don’t need to file since it is such a low amount and below the taxable income. Thank you for any help . I hope this pictures makes it easier.