The 558 form is there because for 2020 you can take a charitable cash donation of up to $300 when you take the standard deduction on your return this year.
You can reduce your amount owed, if you take that deduction. To claim the deduction, go to deductions and credits, go though the deductions again until the screen where it tells you that the standard deduction is best for your return. The next screen will ask if you made any cash charitable donations in 2020 and give you an opportunity to claim up to $300.
