Where can I download the application forms for my visa extension based on marriage in Korat?

The user is preparing for their first visa extension based on marriage in Korat and is inquiring about the availability of application forms. Respondents mention that a fillable TM7 form can be found in the community's files section, and remind the user to print it back-to-back. Other comments address nuances about the reason for the extension, the possibility of extending a non-O visa, and necessary documentation like proof of funds and a bank statement.