What date should I put for intended departure when applying for the DTV under the soft power provision in Thailand?

Hi. I am applying for the DTV under the soft power provision. On the application in the travel information sections n it asks for the intended date of arrival and the intended date if departure. For the intended date of departure do I need to put 180 days since the stay is renewed every 180 days OR do I put the 5 years? Thank you in advance for any insight you may offer.