The free portal is no more ... to get missing stimulus payments you MUST file a 2020 paper return. AND since you are filing this so late to get the third stimulus payment you will ALSO need to file a 2021 return. When the IRS FREE FILE opens sometime in January you can efile it ... http:www.IRS.Gov/freefile.
And the 2 of you really should have a conversation with a local tax pro if you have been filing separately all these years ... you could have large refunds coming to you if you amend to joint for the last 3 tax years.
