My contractor offered me a partnership on his next house flip, what can i do to protect the money i will invest?

The federal due date of the owner's return depends on what kind of tax entity it is (individual, C Corp, S Corp, partnership, trust).State filing obligations need to be identified as well and may have different due dates than the federal return.

The detail of your partnership will be spelled out in the operating agreement and partnership agreement. 

HelloI was wondering if anyone knows about splitting TIC partnership interests during a sale?  

The LLC is run as a 2 person partnership with me owning 99% of the shares.   

Hello, I was approached by a local investor and he offered me to partner on project with him for 1.5% return monthly by lending him money (5k). I think it is very small but needs to boost my real estate career, I want...

Any form of help or partnership would be much appreciated. 

With that in mind, what do I need to be mindful of if this kind of partnership should happen?

This has recently gotten more complicated as I've added partnerships and am now dealing with K1s which necessitate accurate balance sheets.

Owners of LLCs (that are taxed as sole proprietorships or partnerships) can withdraw funds or contribute funds at will and those transactions will not be considered co-mingling of funds.