We are married filing jointly. For 2018 I am a W2 employee and my wife is now a 1099 contract employee. I am trying to figure our estimated tax payments for 2018. On line 13 of 1040-ES it asks for "Income tax withheld and estimated to be withheld during 2018". Since I am a W2 employee my employer withholds federal income tax, medicare tax, and social security tax. I am unsure whether to include all three of these withholdings or just the federal income tax portion.
