Yes, you do need to report 401K distribution. In fact, you should receive form 1099-R from your 401K administrator reporting the withdrawal- and that's how it should be reported on your tax return.
Here is 1099-R data entry:
- Federal Taxes
- Wages and Income
- Scroll down to Retirement
Plans and Social Security
- Select IRA, 401(k), Pension Plans (1099-R)