You can log into your IRS account and look at all the forms you filed. You might want to create an account (verification cation in a pain) and look to see if anyone is filing for refunds from previous years.
I don’t trust doing this on the internet.
Only want to send a request for info to be sent to the ‘safe’ US mail address on file. No need to verify who I am, just send it to the address on file.
I have never filed online, nor have a ever entered my SSN to any online site.