USE QUICK BOOKS!
or something like it to track your invoices / cost / salary etc. without good records you open your self up to tax problems. also if your office is your home you can expense a percentage of your rent/heating/electricity and so on. But… some states require that in order for a home office to be tax deductible is most be a closed room - i.e have a door and only be used for work. Some also require that you must have a client be onsite at some point. DR’s / Lawyers are the reason for this… look at one xray and then write of 30% of their house as office/////