If the distribution was a required minimum distribution, it cannot be rolled over to an IRA (the proceeds can be used to fund an IRA if you are eligible to make an IRA contribution for the year). If the distribution was not an RMD, it can be rolled over within 60 days. The 205 withholding on the distribution is a tax credit on your return that is effectively recouped when you file the return. However, if you want to make a full rollover to the IRA, you’ll have to come up with the 20% that was withheld and add it to the 80% you received.
A portion of earnings withheld by an employer or put into a retirement plan for distribution to the employee at a later date. If certain legal requirements are met, the deferred amount is not taxable until actually paid, for example, after retirement.