What are the potential issues when using the TDAC at the Nong Khai border and how can they be resolved?

When crossing the land border at Nong Khai using the TDAC, travelers may encounter challenges, particularly with the requirement to fill out onward travel information. One user experienced difficulty as the TDAC prompted for a departure date from Thailand, which some commenters noted was due to mistakenly clicking on the 'onward travel section.' They clarified that proof of onward travel is not actually required. A quick solution might be to allow an immigration officer to assist in filling out the form, which proved to be helpful in this case.