As a contract employee with no witholding, you are self employed. That means you have to pay estimated taxes quarterly, as well as both sides of Socail Security, etc. You are entitled to expense deductions for travel, home office and other acceptable business expenses.

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Dave

'05 325xi
'10 E70 35d
'85 911 Carrera
'66 911 Work in progress
'91 Chevy C1500
'95 Jeep Cherokee
‘18 Jeep JLU