While entering the Commission's website www.tspsc.gov.in for New OTR / Edit OTR, in the 3rd column in 4th tab i.e. Basic Education Details, 2 options are visible in drop-down.
1) Regular
2) Not studied in Educational Institute (Resident)
The Distance/Open school mode candidate can go for 2nd option and proceed further without any hindrance.
In this connection, it is also to inform that the Residence Certificate of the Particular period can be submitted to Commission at the time of Verification of Original Certificates.