If you go to a CPA (Certified Public Accountant), get an estimate for what they will charge. Someone on here was billed over $500 for having a CPA do basic income tax returns.
FYI. You can go it IRS.GOV and download forms/instructions on how to handle your 401K withdrawal. It's quite easy...there are a few lines on the 1040 form where you write down the 401k withdrawal info. You can read the instructions and they explain how to fill out the form when you withdrew 401K money.
There are some exemptions where you might not have to pay the 10% withdrawal penalty if you are under 59.5 years old. The instructions clearly explain what the exemptions are, and how to fill out the form if you qualify for them.
Since you did your taxes on your own last year, this extra step might take you an hour extra to read the instructions and to fully understand how to fill out your tax return for your 401K withdrawal.
Then it doesn't cost you anything.
I fill out my own tax forms every year and use the IRS instructions and forms.
The 10% penalty for early 401K withdrawal goes on Form 1040, Line 59.
You also need to pay income taxes on the money that was withdrawn.
1040 Line 15a is where you put the amt of your 401k withdrawal, and line 15b is where you put the amt of the withdrawal that is subject to income taxes(The same amt goes on line 15a & 15b in your case).
It's possible that the income taxes were already deducted when the 401k company sent you the withdrawal money. If so, the 1099R that you receive from the 401K company will specify the amt of income taxes that were deducted. If none were taken out, it will specify this also.
If they took out income taxes, make sure you have the amt of taxes they took out included on Form 1040, Line 62, so you get credit for those taxes that were already paid. This is the same line that gets the Federal Taxes paid that comes from your W2 from your employer. You add them together...taxes paid from 1099-R(401k withdrawal) + Federal taxes paid from W2.
You might need to fill out form 5329. The instructions explain the exemptions and tell you whether you need to fill out this form or not.
Link to
Form 5329.
http://www.irs.gov/pub/irs-pdf/f5329.pdf
Link the
Instructions for Form 5329:
http://www.irs.gov/pub/irs-pdf/i5329.pdf
Link to
Instructions for Form 1040:
http://www.irs.gov/pub/irs-pdf/i1040.pdf
Link to
Form 1040: http://www.irs.gov/pub/irs-pdf/f1040.pdf
Here is a link to general rules that explain exemptions to the 10% penalty
Tax Topics - Topic 558 Additional Tax on Early Distributions from Retirement Plans, Other Than IRAs