So essentially what happened is that no sales tax tracking has been done in QB - other than the YE entries. That's actually not so bad for you - there no need to change anything in those prior years (if the ye je was right)
If you want to start using the QB system as of Jan 01 then you will just need to recode the last 3 months.
BUT first - since the QB system has never been used - it probably hasn't been setup (or updated). Id suggest you go thru setup process first before trying to use any of the tax codes
