I filed my federal taxes before new legislation went into affect for the unemployment tax credit. I was curious if there was an estimate calculator available?

[otterbutter12]

I know the first $10,200 of unemployment is tax free, how can I figure out what is owed back to me?

[Mike9241]

the problem is if you changed the online return, that's what will be there for next year which can cause issues.

however, you have several options:

1) you can change your online return and subtract the lesser of your UC comp or $10,200 on schedule 1 line 8 but then you'll have to remember to change it back

2) you can take your taxable income and subtract the lesser of your UC comp or $10,200. then go to the tax tables or tax rate schedule in the 1040 instructions https://www.irs.gov/pub/irs-pdf/i1040gi.pdf and compute your tax. compare your new tax line 24 to your old tax line 24  

[NCperson]

or you can make it even easier by multiplying the lessor of your unemployment income or $10,200 by your marginal tax rate.