sir I have attended for first phase and I alloted a seat and am not interested to join in that clg and should I attend fir next phase without paying tution fee

If you aren't interested in the alloted College then you need not pay any kind of fees. You Can just cancel your admission or skip the confirmation letter and  apply in the next counseling.

If in case server isn't showing the option to skip then inform in the alloted College to cancel your admission. Once the admission gets cancelled you can apply in the next counseling.