Am I fined for late 90-day reporting if I visit the immigration office on the 20th instead of the 13th in Thailand?

Sorry I pulled the comments from this because of the info

IF your actual due date was Monday the 13th you have until the immigration office closes on Monday the 20th to file your report. <- up to a week (exact count) late. IF you report on the 21st you will be fined.

Here is an example I made showing a due date of the 17th of Feb with the "window of opportunity" you have to file a report in person (21 days)