https://ttlc.intuit.com/community/taxes/discussion/mail-usps-which-service/01/3324149#M1223670 <P>I'm mailing my past due 2020 tax return and need to know best way to send it. I read Certified with Return Receipt is best way but then somewhere else says if the IRS can't sign, it will be returned. Can you please tell me best way to mail through USPS?</P><P>&nbsp;</P><P>Thank you.&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Wed, 11 Feb 2026 08:14:23 GMT planetm69 2026-02-11T08:14:23Z https://ttlc.intuit.com/community/taxes/discussion/mail-usps-which-service/01/3324149#M1223670 <P>I'm mailing my past due 2020 tax return and need to know best way to send it. I read Certified with Return Receipt is best way but then somewhere else says if the IRS can't sign, it will be returned. Can you please tell me best way to mail through USPS?</P><P>&nbsp;</P><P>Thank you.&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Wed, 11 Feb 2026 08:14:23 GMT https://ttlc.intuit.com/community/taxes/discussion/mail-usps-which-service/01/3324149#M1223670 planetm69 2026-02-11T08:14:23Z https://ttlc.intuit.com/community/taxes/discussion/re-mail-usps-which-service/01/3341336#M1231751 <P>This is up to you and your level of comfort.</P> Tue, 16 Apr 2024 14:55:47 GMT https://ttlc.intuit.com/community/taxes/discussion/re-mail-usps-which-service/01/3341336#M1231751 CatinaT1 2024-04-16T14:55:47Z