Do you still need my wife's information even tho we are separated with no contact and are filing separatly?

[JustinW]

If you are married, filing separately, you will still need to enter your spouse's name and SSN on the 1040.  However, If you file a separate return, you generally report only your own income, credits, and deductions.

https://taxmap.irs.gov/taxmap/pub17/p17-013.htm