After e-filing my 2020 return on which I stated I hadn't gotten my $600 stimulus well it arrives a week later. Should I access the funds or am I in trouble already?

Can I amend the return before its processed? Should I cut up the card and just not access the money? Am I in trouble with the IRS even though they were late in getting it to me and I answered the questions truthfully figuring that I wasn't getting one in the mail?