Retirement tax questions

If you were still married on Dec 31, 2022 and you don't file a joint return you will need to enter each other's ssn on your MFS Married filing Separate returns.  So yes he needs your ssn and you need his.

 

You don't enter a 1095B or C into a tax return.  Only enter a 1095A form.   Ignore the 1095B.