Also also, if you have no other taxable income this year, this would be a very good time to convert some or all of the proceeds to a Roth IRA.
@dmertz knows more about this than I do.
Suppose you are single with no other taxable income. You have a $10,400 personal exemption + standard deduction. If you converted $10,000 of the 401(k) to a Roth IRA, it's all taxable income, but you pay no tax because it is less than your exemptions. Then since it is in a Roth IRA, you also pay no tax when you withdraw the money in retirement. (There is no 10% penalty for early withdrawal if you are under age 55 either, if it is a Roth conversion.) And if you converted $20,000, you would only pay 5% income tax ($10,000 tax free and the next $9500 taxed at 10%.)
You might have to roll over from the 401(k) to a private IRA first, then convert part of the IRA to a Roth IRA.
@dmertz will know more.
