Q. If the 401k loan defaults will I have to file taxes on the imputed distribution income, shown on the orm1099-R?
A. Simple answer, yes. The fact that the penalty has to be calculated mandates that a tax return be filed. You will want to file a tax return as there will probably be a refund. It's unlikely that the 401k plan administrator will calculate the tax and penalty exactly.
If the amount is large enough, it could cause some of your social security to become taxable.
Social security becomes taxable when added to sufficient other income.
Social security, including disability (SSDI) becomes taxable when your income, including 1/2 your social security, reaches:
Married Filing Jointly(MFJ): $32,000
Single or head of household: $25,000
Married Filing Separately and lived with your spouse at any time during the tax year: $0
This answer has been verified for accuracy by an Intuit expert employee
