Can I extend my tourist visa in Chiang Mai before it expires, and what will the new expiration date be?

The user inquires about extending their tourist visa currently valid until January 28, 2023. They seek clarification on whether they can apply for a 30-day extension right away or if they need to wait until closer to their visa's expiry. A comment indicates that extensions can be requested when there are 45 days or less remaining on the visa.