The Taxpayer Advocate Service (TAS) has developed several tools for individuals and employers to assist in estimating ACA related credits and payments. Since these tools only provide an estimate, you should not rely upon them as an accurate calculation of the information you will report on your tax return. You should use these estimators only as a guide to assist you in making decisions regarding your tax situation.
TAS is an independent organization within the IRS whose job is to ensure every taxpayer is treated fairly and that taxpayers know and understand their rights.
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.