E-Commerce, advertisement, seo consultation what ever you want to call it just claim it and pay your due. Don’t mess around with Sam he will make your life hell. If you have a good accountant he can help you with may write offs and things like that.
Then there is things like buying a house or car etc, you will need proof of income and employment if you don’t have that then you will have to go back a few yrs and ammend your taxes to get the loan.