Retirement tax questions

That was great information. I sent a request for waiver from fees for late filing of a 2018 8606 along with an 8606 in April 2020, and haven't had any other non-deductible TRAD-IRA's as this was an error on my part. IRS said they received and associated the form 8606 with my account. the went on to say that "a form 1040x is required to amend my return."  Amending my return would do nothing to change my taxes for 2018. do I need to amend my 2018 return? I didn't think I needed to if there was no impact. IRS didn't state whether there would be a late filing fee for the 8606, or if it would be waived. I reached the threshold in 2018 and my tax reporting software didn't warn me of it, or I would have recharacterized it.