I provide consulting services as an unincorporated sole proprietor. I have a longstanding individual 401k for this business endeavor. The 401k is a prototype "super simplified standardized individual 401k profit sharing plan" with a brokerage.
I have another service business, in a different field, which is organized as a single-member LLC. There are not retirement plans specifically associated with this business.
Can I contribute income from business
Yes, because you own both businesses, your two business are considered a controlled group As a controlled group, they are treated as a single employer with regard to retirement plans. If you are 100% owner of your sole proprietorship and your LLC is a single-member LLC, these must be treated as a single company and your net earnings from self-employment income will be determined by aggregating these two businesses.
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I formed a new LLC in 2020. When I lost my job last year I rolled my 401K with my previous employer into a new 401k under the LLC entity. I contributed $700 from my LLC income into the new 401k on 12/31/2020 in order to max out my contribution for the year. Where do I enter the $700 on the tax forms? Also, I paid a set up fee to the broker and have annual maintenance fees on the new LLC 401k. Do I enter this on the Schedule C?
Also, I had some personal property expenses (desk, computers, furniture, phone, etc.). I use some 100% of the time and some 50% of the time for business use. Do I need to fill out 4562 for this type of personal property, or is personal property an exception?