I currently have an employer sponsored 401k that I contribute to the limit, with about 3k in employer matching. I also do some work on the side, and do not currently have a Solo 401k. My understanding is that one can have both, but the total can't exceed IRS limits.
Here's my question: Within a Solo 401k, can I still contribute the 25% of income employer contributions allowed? To use an example, if I have 20,000 in self-employment income, can I deduct another $5000?