I can't delete Form 8880 in the Tools section. After I click delete and confirm, it brought me back to the forms screen Form 8880 is not deleted. How can I delete it?

The form 8880 will re-generate if you have contributions to a qualified retirement account such as a 401K.  Those contributions may be shown on your Form W2 box 12.  Is the form causing an error in your return?  It is okay to leave the form in; if you don't qualify the credit will be zero.