The county takes a slice of every sale in the city, and it applies whether or not a firm list mentions it.
Inside the city, the county slice of sales tax is 0.5 percent. It sits beside the city slice and the state slice. The filings page writes the whole stack. This page stays with the county half, because that is the piece people forget when they say the rate is just the city's.
A sale near the edge of the city is not a guessing game. The state locator is the check. A shop that delivers, a shop that invoices a job outside the line, and a shop that only rings a counter inside the city can owe different answers. We do not memorize a guess. We read the locator for the sale you actually made.
The half becomes a bookkeeping problem when it is mixed into one sales tax bucket with no month. The return wants a period. The bank shows a payment. If those two are not the same window, the county half is how a small difference starts. Name the period when you set the money aside, not when the argument starts.
Ranch buildings on the heritage grounds are a record of how people kept a place. The books are a smaller record of how a shop kept a month. Neither one improves because someone felt busy. They improve because someone wrote down what happened and stopped at a date.
The county half does not change because a directory used a friendly adjective. Owners in Lubbock still match the payment to a period. The locator is the source for the sale in front of you, and a memory of last year's rate is not a source.
If your software has one sales tax item and three rates inside it, the close has to prove the split. A payment to the state that matches the sum is not the same as a payment that matches each piece. We want the pieces visible before the 20th, so the payment is a confirmation.
Bring the last sales tax payment and the month you think it covered. If they disagree, that disagreement is the work. The filings page carries the rest of the stack, including the May franchise report, without inventing a threshold.