Tax Filing Status

My husband and I file MFJ making 200k total and both claim 0 deductions.  I also pay 125/5 extra fed/state taxes each 2-week pay period.  We both contribute to pre-tax retirement accounts, mine is over 20k the last 2 years.  Yet we’ve paid over 13k in fed taxes the last 2 years. Why when we have 0 deductions?