Retirement tax questions

And
...if the closing is in the Early part of January (first two weeks), I doubt you can  a) get the funds in your hands....b) deposit in the bank AND have the $$ clear and allow you to get a certified check for the closing .

You should talk to the 401K administrator to see how long it takes them to issue a check. A few...in the past...have taken several weeks to process and issue a check, but your 401K Admin may be more prompt.  Ask now.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*