401K 관련 질문??

안녕하세요..

제가 401K를 정말 잘 몰랐어요 ㅠㅠ 전문가님들의 조언 부탁 드립니다.

이번에 회사를 옮기게 되면 서 다시 401K를 가입 할려구 하는데  ( BEFOR-TAX OR ROTH 401K ) 두개 어떤 부분이 틀린가요? 둘중에 하나만 가입 하면 되는건지?

그리고 이전 401K 를 Rollover 할려구 하는데 하기 양식에 체크 하여야 하는데 이부분도 너무 어렵습니다.. ㅜㅜ ( 어떤 부분에 체크를 하여야 하는지.?)

고수님들 부탁 드립니다.

This rollover is a distribution from: (Select one type of plan or account.)

-Qualified Plan(  ) -§403(b) Tax Sheltered Annuity  (  )   -§457 Plan (  )
-Individual Retirement Account (  ) -SIMPLE IRA (Must be in existence at least 2 years.) (  )

If Qualified Plan( ), is this rollover from a related employer? (Most rollovers are unrelated.)
o No Unrelated  (   )  o Yes Related  (  )

Note: If you do not check a box, we will understand you have certified that the rollover is from an unrelated employer.

Select rollover type:
oBefore-Tax 401(k) $______________________________
Total Rollover Amount
oRoth 401(k) $________________ (Contributions) + $________________ (Earnings) = $________________ Total Rollover Amount
Date Roth 401(k) contributions began: (If not provided, ADP will use date contribution is received) ________ / ________ / 20___
Note: Rollovers of Roth 401(k) monies may only be made via direct rollover and may not be rolled over from an IRA. Please refer to the distribution
statement provided by your prior 401(k) provider for this information.

Contribution Election Limits If you select:                you can contribute:  Before-Tax 1% - 60% Roth 401(k) 1% - 60% Combined Before-Tax and Roth 401(k) 60%