Can I contribute to a sep account if I have 1099 and W-2 income even if I have a 401k?

[dmertz]

If you have net profit from self-employment, yes, you can contribute to a SEP-IRA.  Your participation in the 401(k) plan provided by your W-2 employer has no effect on the amount that you are eligible to contribute to the SEP-IRA.  Only a 401(k) plan established under your self-employment business would affect your eligibility to contribute to a SEP-IRA.