I got the same "Reject Code OR_FederalTaxLiability_SoftwareUpdate_R18_TY21" however I get the information below when I attempt to "fix it" in TurboTax. Hope this helps.
"Your Oregon tax return is on hold pending a product update to Federal Tax Liability. Please check back for updates.
What needs to be done:
There is a known issue with your Oregon return around Federal tax liability subtraction that we are currently correcting. The third Federal economic stimulus payments were not being included in the calculation. Please come back on or after February 17, 2022 and apply any product updates (online products update automatically). After applying the update, go through your Oregon return again, run final review, make any applicable changes if necessary, and re-transmit the return(s). Note: The calculation change may affect the taxpayer's refund."
