About all you can do is print and write REFUSED on the Schedule B "Seller-Financed Mortgage Interest Statement" in place of the SSN and sign and mail your tax return. You cannot e-file without a valid SSN (Note that the payer can be subject to a IRS penalty for failing to provide a SSN when required for a tax return.)
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
