I will be selling goods at a festival in New Jersey this fall. I am adding sales tax on top of my price and wondered what the laws are regarding rounding. Is it okay to round to nearest quarter rather than nickel dime and penny?
According to the NJ State Treasury site, you must round to the nearest cent.
One option might be (I don't know the laws or reporting requirements regarding this) to post prices "including sales tax" and back-calculate the actual item prices from that. I see this at fairs and other events where price differentiation is not an issue (meaning you're not trying to compete with other vendors on price).