Should I amend return or simply mail in documents?

I filed my taxes back in the beginning of February and they were quickly accepted. At the end of the month, I got a letter requesting form 1095-A. and form 8962. I lost that letter that I was supposed to send back with them, but when I spoke with someone at Intuit, they said I could simply fill them out and send with an explanation and didn't need to file an amended return. This was right before COVID became a massive thing, and now its been over 3 months since I sent these documents in. Is it possible they simply lost my forms with how crazy everything got and I should send them in again? Should I file an amended return? Any help is appreciated.