Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

How to determine how much to charge your business for rent (in your house)?
To be confident in your solution, and get the best solution for you, consult a local accountant, preferably one who is specialized in taxes for businesses.  Or muddle through the code and figure it out for yourself.  The primary advantage in consulting with an accountant is that you can ask them to point out ways you can restructure your expenses, debts and income in order to minimize your tax burden.  They can help you run the numbers for the various options and choose the one that is right, numerically.