I'll assume that you do not own a share of the W-2 employer that would make that employer and your LLC a controlled group required to be treated as a single employer for the purpose of a retirement plan. Since you have sufficient compensation from the W-2 employer and your MAGI will not be large enough to phase out your Roth IRA contribution, you can contribute to the Roth IRA from your W-2 income. Separately, you can make a SEP IRA contribution based on your net earnings from self employment (or not, if you choose not to).
