Hi Sarah,
The "effective" tax rates are mainly informational. They can fluctuate slightly based on the way the county determines your tax liability (i.e. there are fixed fees per number of nights stayed). The more gross income you have in a particular month, the lower the effective tax rate. It's usually around 8%.
I am not sure what you mean by a monthly version. For each column, you can copy and paste the values directly into the PDF form provided by the city. For the state taxes you can do the same (you just really need to paste the "gross receipts" on row 29 into the TNTAP online form)
Hope that helps!
Jonathan