Hey, I'm working on my service agreement at the moment and I'm stumped on the whole billing option/ payment option. Should I state that if they pay in cash they are not applicable for taxes?? and the opposite for checks? Also should i have other billing options other then monthly as performed? What do you guys do? Do you send the invoice out with the charge or taxes and have a note saying omit tax if you send cash? HELP!! Thanks in advance!