Same thing happened to me (lower income but higher taxes).  For me I lost some tax deductions due to the tax law changes.  People in high tax states like CA, NY, and CT got hit really hard since they were severely limited in what they could deduct.

If you're talking about taxes owed (not total tax liability), then your employer didn't withhold enough taxes from your paychecks.  Be sure to adjust your withholding allowances if this is the case.

If you're talking about your total tax liability that increased, then agreed...it is probably due to limitations on SALT deductions (state and local income taxes max out at $10k).  So if you live in a high property tax state and pay more than $10k in property tax, you may lose out on that deduction.  You definitely lose out on that deduction if your SALT is greater than the married filing jointly standard deduction of $24k.
  

Ditto. Had a big tax payment this year. Same withholdings from last year. The Tax bill was a big sham!

welcome to the scam...

Most people, including me, did not notice that the withholding tables changed so your employer took less money out. For those of us in high tax states this changes your deductions and you get socked with a tax bill. Last year I had a refund, and this year I owe over 1k.

No wonder the big "Tax Reform" bill disappeared very quickly from the Republican talking points during Mid Term Elections. A big fat gift to the "elites" that Trump campaigned against while hurting those groups he said he was representing. What a crock!

Under view go to Forms and click on the two year comparison. This will yield your answer.

Blame Trump's new tax law.