How can I contact IRS due to my check? Can't call them. My status says my refund check was mailed to me and returned by the post office as undeliverable.

[greenwolf1906]

It says also, "to ensure delivery of your refund, we need your current address."

[Critter]

Your ONLY option is to mail in a form 8822 to update your mailing address with the IRS so the check can be remailed  ...    https://www.irs.gov/pub/irs-pdf/f8822.pdf