I need a copy of the Terms of Withdrawal on my 403-B account to fulfill a document requirement for a mortgage loan. How to I get a copy?
You may obtain a copy of that by calling the company that administers your 403b. Look at your statement to see what company does that (the company name would be the logo on the statement). Your statement should also have information how to contact them for questions.
Be careful though about withdrawing money though so you avoid taxes and penalties. Hopefully you are looking for this document simply to comply with needing it for the paperwork, and not needing this document as a source of funding a down payment for the mortgage. If in doubt, talk to your tax preparer about the ramifications of using your 403b as a down payment source (I can't tell from your question what the real purpose of needing that document is).
Congrats on going through the mortgage loan process - best wishes on being successful.