taxes on a rental

[Jared Pittman]

ok i am very new to this game, i have been reading and researching for almost a year of my spare time.  i have decided to take the plung, i am looking to buy with a private lender.  I am looking for properties that do not need work, have a tenant, and cashflow from day one.  I have found a few i am interested in but its the price analysis i am having troubles with.

For mortgage i use 6% interest as a base but that could change depending on lender

insurance i used my insurance app to get a quick estimate, seems high to me but ill call them to figure it out before i move forward so not worried there

management i put in 10% 

maintenance and vacancy also 10%

taxes is where im having trouble, i used my county tax assessor website to find the previous years numbers, but it gives me tax amount of 3k, principle of 1500, payment date, and total of 1500.

so do i use the 3k or the 1500? theres only one payment listed per year but the few i have looked at seem to be exactly half like shown, help please and thanks!